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Volume 97, Pages 1-584 (15 August 2012)

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Volume 101 (2012)Volume 100 (2012)Volume 99 (2012)Volume 98 (2012)Volume 97 (2012)Volume 97 pp. 1-584 (15 August 2012)

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Review paper

3 A review on creatinine measurement techniquesReview Article Pages 1-8 Elham Mohabbati-Kalejahi, Vahid Azimirad, Manouchehr Bahrami, Ahmad Ganbari

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Highlights

► All sensors for creatinine measurement are categorized into five main groups. ► Their mechanisms, subsystems, benefits and problems are explained. ► Response time, interfering parameters, detection limit and linear range are studied. ► The MIP based method is specified as the best method regarding to above parameters.

Regular Papers

4 High-speed cryo-focusing injection for gas chromatography: Reduction of injection band broadening with concentration enrichmentOriginal Research Article Pages 9-15 Ryan B. Wilson, Brian D. Fitz, Brandyn C. Mannion, Tina Lai, Roy K. Olund, Jamin C. Hoggard, Robert E. Synovec


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Highlights

► High-speed cryo-focusing injection system made from a short section of MXT column. ► Produced peaks 6.3 ms wide at half height. ► Injected mass limits of detection in the low picogram range. ► Achieved a total peak capacity of 460 peaks during 3 min GC separation.

5 Ultrasonic assisted synthesis of adenosine triphosphate capped manganese-doped ZnS quantum dots for selective room temperature phosphorescence detection of arginine and methylated arginine in urine based on supramolecular Mg2+–adenosine triphosphate–arginine ternary systemOriginal Research Article Pages 16-22 Hu-Bo Ren, Xiu-Ping Yan

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of 17Talanta | Vol 97, Pgs 1-584, (15 August, 2012) | ScienceDirect.com

4/8/2555http://www.sciencedirect.com/science/journal/00399140/97

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Highlights

► Ultrasonic assisted approach for rapid synthesis of ATP-capped Mn-doped ZnS QDs. ► ATP-capped Mn-doped ZnS QDs for selective phosphorescent detection of

(methylated) arginine. ► The selectivity is based on the supramolecular Mg2+–ATP–arginine ternary system. ► The probe exhibits a low limit of detection (0.23 μM).

6 Micellar electrokinetic chromatography method for the simultaneous determination of furanic compounds in honey and vegetable oilsOriginal Research Article Pages 23-31 Yong Foo Wong, Ahmad Makahleh, Khaldun M. Al Azzam, Noorfatimah Yahaya, Bahruddin Saad, Siti Amrah Sulaiman


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Highlights

► Separation of six furanic compounds was for the first time reported. ► Separation was conducted using MEKC. ► Method is applicable in different foodstuff matrices (honey and vegetable oils). ► 2-F and 5-HMF are the most abundant furanic compounds in honey samples. ► Proposed method is simple and fast.

7 Determination of a liquid chromatography–tandem mass spectrometry method for the determination of sulfonamides, trimethoprim and dapsone in honey and validation according to Commission Decision 2002/657/EC for banned compoundsOriginal Research Article Pages 32-41 Anastasios Economou, Olympia Petraki, Despina Tsipi, Eleni Botitsi


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Highlights

► A confirmative method for sulfonamides, trimethoprim and dapsone in honey is developed. ► Acidic hydrolysis and SPE was applied followed by LC–MS/MS analysis. ► The method was validated according to CD 2002/657/EC for non-authorized substances. ► Trueness and precision data complied with legislation requirements. ►

Detection capability (CCβ) values were in the ranges 0.7–1.4 μg kg−1.

8 Sensitive chemiluminescent immunoassay of triclopyr by digital image analysisOriginal Research Article Pages 42-47 Aurora N. Díaz, Francisco G. Sánchez, Enrique N. Baro, Ana F.G. Díaz, Alfonso Aguilar, Manuel Algarra


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Highlights

► A chemiluminescent ELISA for detecting triclopyr was developed. ► A low price camera (CCD) with homemade software allows excellent sensitivity. ► Light contamination between neighboring wells was attenuated by software implementation of a circular mesh covering the perimeter of each well.

9 An integrated lab-on-a-disc for automated cell-based allergen screening bioassaysOriginal Research Article Pages 48-54 Q.L. Chen, K.L. Cheung, S.K. Kong, J.Q. Zhou, Y.W. Kwan, C.K. Wong, H.P. Ho


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10 Aliphatic and aromatic amines in atmospheric aerosol particles: Comparison of three ionization techniques in liquid chromatography-mass spectrometry and method developmentOriginal Research Article Pages 55-62 José Ruiz-Jiménez, Sanna Hautala, Jevgeni Parshintsev, Totti Laitinen, Kari Hartonen, Tuukka Petäjä, Markku Kulmala, Marja-Liisa Riekkola


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Highlights

► Development of complete validated methodology for the determination of 19 amines. ► Ambient 30 nm and total suspended aerosol particles were used as natural samples. ► The derivatization of the amines was accelerated by ultrasounds. ► The superiority of ESI over APCI and APPI was demonstrated for the target compounds. ► 13 amines were quantified for the first time in 30 nm aerosol particles.



11 Survey analysis and chemical characterization of solid inhomogeneous samples using a general homogenization procedure including acid digestion, drying, grinding and briquetting together with X-ray fluorescenceOriginal Research Article Pages 63-72 Eskil Sahlin, Bertil Magnusson


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Highlights

► A methodology for performing survey analysis of inhomogeneous waste is presented. ► Waste samples are homogenized and analyzed by X-ray fluorescence. ► An internal standard is used for samples containing elements not measurable with XRF. ► 55 elements were studied and the methodology is applicable to 49 of these elements. ► The possibilities with the methodology are discussed.

12 Mixture-process variable approach to optimize a microemulsion electrokinetic chromatography method for the quality control of a nutraceutical based on coenzyme Q10Original Research Article Pages 73-82 G. Piepel, B. Pasquini, S. Cooley, A. Heredia-Langner, S. Orlandini, S. Furlanetto


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Highlights

► A MPV approach was applied to optimize a MEEKC method. ► MPV models were developed from the resulting data. ► MPV models were used to identify the design space and desirable MC proportions and PV settings.

13 Methyl mercury in nail clippings in relation to fish consumption analysis with gas chromatography coupled to inductively coupled plasma mass spectrometry: A first orientationOriginal Research Article Pages 83-86 Petra Krystek, Paulo Favaro, Peter Bode, Rob Ritsema


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14 Preparation and characterization of magnetic nanocomposite of Schiff base/silica/magnetite as a preconcentration phase for the trace determination of heavy metal ions in water, food and biological samples using atomic absorption spectrometryOriginal Research Article Pages 87-95 Hasan Bagheri, Abbas Afkhami, Mohammad Saber-Tehrani, Hosein Khoshsafar


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Highlights

► A new sorbent was prepared by functionalization of magnetie nanoparticles. ► A recently synthesized Schiff base was used for functionalization of nanoparticles. ► The prepared sorbent was characterized by different methods. ► The sorbent was used to the preconcentration of trace amounts of several cations.

15 Novel multi walled carbon nanotubes/β-cyclodextrin based carbon paste electrode for flow injection potentiometric determination of piroxicamOriginal Research Article Pages 96-102 Elmorsy Khaled, Manal S. Kamel, Hassan N.A. Hassan, Ahmed A. Haroun, Ahmed M. Youssef, Hassan Y. Aboul-Enein


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Highlights

► Multi-walled carbon nanotubes/β-cyclodextrin modified carbon paste electrode is constructed. ► Using of the nanocomposite improved the sensitivity, response time and lifetime. ► The developed sensors were applied for piroxicam determination in pharmaceutical formulations.

16 Comparison of fatty acid analysis methods for assessing biorefinery applicability of wastewater cultivated microalgaeOriginal Research Article Pages 103-110 Sung-Geun Woo, Keunje Yoo, Juyoun Lee, Sara Bang, Myungjin Lee, Kwangchul On, Joonhong Park


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Highlights

► We added more explanations regarding the lack-of-fit tests and F-ratio. ► We added discussion about the differences of FA profiles among 3 microalgae. ► We corrected additional errors in terms, units or English usage as suggested.

17 A new ion pair receptor fulfilling a dual function as a chromogenic molecular switch for F− and ratiometric selective recognition of HSO4

−Original Research Article Pages 111-117 Xiu-Ming Liu, Ya-Ping Li, Wei-Chao Song, Qiang Zhao, Xian-He Bu


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Highlights

► 1 shows high selectivity for detecting F− in color change and spectra change. ► 1

functions as a chromogenic molecular switch by using combinations of F− and K+. ► 1

shows high selectivity for detecting HSO4− by the naked eye in 1·K+ complex. ► 1

shows selectivity for detecting HSO4− in ratiometric manner in 1·K+ complex. ► Titration

experiment of 1 with HSO4− in case of K+ shows enhancement of affinities.

18 Pretreatment of whole blood using hydrogen peroxide and UV irradiation. Design of the advanced oxidation processOriginal Research Article Pages 118-123 Stefanie A. Bragg, Kristie C. Armstrong, Zi-Ling Xue


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Highlights

► A new process using H2O2 and UV irradiation to pretreat blood samples. ►

Investigation of the effect of pH on the AOP process and kinetics of the pretreatment. ► Photon flux from the UV lamp as the rate limiting process. ► Determination of metal concentrations in the pretreated blood samples.

19 Use of tetraethylenepentamine-functional Fe3O4 magnetic polymers for matrix solid phase dispersion extraction and preconcentration of Cr(VI) in water samples at ultratrace levelsOriginal Research Article Pages 124-130 Xun-Ping Yao, Zhen-Jun Fu, Yong-Gang Zhao, Li Wang, Lan-Yun Fang, Hao-Yu Shen


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Highlights

► We synthesized tetraethylenepentamine-functional Fe3O4 magnetic polymers (TEPA-

NMPs). ► We proposed an effective MSPD procedure with TEPA-NMPs materials. ► We found the TEPA-NMPs had strong ability for preconcentration of Cr(VI). ► We discussed in detail the preconcentration conditions of Cr(VI). ► We proposed a novel MSPD-FAAS method for the analysis of Cr(VI) at ultratrace levels.

20 Simultaneous determination of organophosphorus, organochlorine, pyrethriod and carbamate pesticides in Radix astragali by microwave-assisted extraction/dispersive-solid phase extraction coupled with GC–MSOriginal Research Article Pages 131-141 Xuejin Mao, Yiqun Wan, Aiping Yan, Mingyue Shen, Yuanlong Wei


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Highlights

► Simultaneous detection of OPPs, OCPs, PYRs and CBs in CHMs was developed. ► MAE/D-SPE technique simplifies sample treatment and minimizes the use of solvent. ► Matrix-matched standard curves were used for quantitative analysis.

21 A fast and sensitive method for the determination of nitrite in human plasma by capillary electrophoresis with fluorescence detectionOriginal Research Article Pages 142-144 Xu Wang, Erwin Adams, Ann Van Schepdael


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Highlights

► The analysis time was within 1.4 min and the LOD of nitrite was 0.6 nM in plasma. ► The CE method is simple and low cost compared with the fluorometric HPLC methods. ► The nitrite concentration measured is consistent with most frequently reported results.

22 Determination of deoxynivalenol and nivalenol by liquid chromatography and fluorimetric detection with on-line chemical post-column derivatizationOriginal Research Article Pages 145-149 Marilena Muscarella, Marco Iammarino, Donatella Nardiello, Carmen Palermo, Diego Centonze


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Highlights

► Accurate analytical method for the determination of DON and NIV in cereals. ► Excellent real sample clean up by hydrophilic–lipophilic cartridges. ► Method validation according to the recent European rules. ► Method application to accurate confirmation analyses even in baby foods.

23 A simple way to configure on-line two-dimensional liquid chromatography for complex sample analysis: Acquisition of four-dimensional dataOriginal Research Article Pages 150-156 Sai Ma, Qionglin Liang, Zhiting Jiang, Yiming Wang, Guoan Luo


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Highlights

► Set up HPLC×UPLC-TOF MS based on commercial chromatographs. ► 4D data containing 2D retention times, intensity and m/z ratios. ► As many as 398 peaks detected from a complex sample, TCM Qingkailing. ► Compared with HPLC×HPLC, reduce the analysis time by 75%. ► Increase the number of recognized components by three times.

24 Reagentless and calibrationless silicate measurement in oceanic watersOriginal Research Article Pages 157-162 William Giraud, Ludovic Lesven, Justyna Jońca, Carole Barus, Margaux Gourdal, Danièle Thouron, Véronique Garçon, Maurice Comtat


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Highlights

► Silicate determination in seawater with an electrochemical detection. ► No addition of liquid reagent required thanks to in situ oxidation of molybdenum. ► Calibrationless method with two electrodes measurements.

25 Real-time determination of critical quality attributes using near-infrared spectroscopy: A contribution for Process Analytical Technology (PAT)Original Research Article Pages 163-170 Juan G. Rosas, Marcel Blanco, Josep M. González, Manel Alcalà


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Highlights

► We monitor the critical quality attributes of a pharmaceutical solid formulation. ► Near infrared spectroscopy allows obtaining of both chemical and physical information of the process. ► Faster, simpler, accurate and more precise methods are obtained using multivariate calibration models.

26 Salt release monitoring with specific sensors in “in vitro” oral and digestive environments from soft cheesesOriginal Research Article Pages 171-180 Larisa Lvova, Sylvain Denis, Aurélien Barra, Patrick Mielle, Christian Salles, Catherine Vergoignan, Corrado Di Natale, Roberto Paolesse, Pierre Temple-Boyer, Gilles Feron


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Highlights

► The array of ISEs was applied for “in vitro” salt release monitoring from soft cheeses. ► The artificial mouth and gut digestive environments were applied for cheese

breakdown process. ► The possibility to detect Na+ ion amounts in cheeses at different steps of digestion was shown. ► The classification of mozzarella cheeses according to



the saltiness and milk origin was performed. ► The developed ISE array may be employed in food industry for on-line real time process monitoring.

27 Study of bond Elut® Plexa™ PCX cation exchange resin in flow injection column preconcentration system for metal determination by flame atomic absorption spectrometryOriginal Research Article Pages 181-186 Aristidis N. Anthemidis, Sofia Xidia, Georgia Giakisikli


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Highlights

► Study of Bond Elut Plexa PCX as sorbent material for metal determination. ► Development of a FIA-SPE-FAAS method for Cd, Pb and Cu determination. ► Implementation of an exchangeable cartridge format in an on-line column system. ► Application in environmental and biological samples.

28 Determination of Mercury in indoor dust samples by ultrasonic probe microextraction and stripping voltammetry on gold nanoparticles-modified screen-printed electrodesOriginal Research Article Pages 187-192 E. Bernalte, C. Marín Sánchez, E. Pinilla Gil


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Highlights

► Optimization of ultrasonic probe microextraction of Hg(II) using chemometric tools. ► Development of SWASV method at AuNPs-SPE for fast and reliable Hg monitoring. ► ICP-MS and Certified Reference Materials for validating the proposed methodology. ► Application to complex dust samples collected at different indoor ambient.

29 Sensitive and selective capillary electrophoretic analysis of proteins by zirconia nanoparticle-enhanced copper (II)-catalyzed luminol–hydrogen peroxide chemiluminescenceOriginal Research Article Pages 193-198 Qingchun Liu, Jingqing Wu, Jing Tian, Chenling Zhang, Jingjie Gao, Nurgul Latep, Ying Ge, Weidong Qin


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Highlights

► SDS interacts with and suppress the wall-adsorption of proteins. ► Sensitivity and selectivity of copper (II)-catalyzed chemiluminescence detection improved. ► Zirconia nanoparticles further improve the chemiluminescence and separation efficiency. ► The method is capable of detecting heme proteins in real samples.

30 A new method for determining the acid number of biodiesel based on coulometric titrationOriginal Research Article Pages 199-203 Fabiano Barbieri Gonzaga, Sidney Pereira Sobral


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Highlights

► Determination of the acid number of biodiesel using coulometric titration. ► Potentiostat/galvanostat and electrochemical cell with Pt, Ag and pH electrodes. ► Primary method, smaller sample size and results with better repeatability.

31 Effect of organic solvents on peroxidases from rice and horseradish: Prospects for enzyme based applicationsOriginal Research Article Pages 204-210 Priyanka Singh, Rajiv Prakash, Kavita Shah


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Highlights

► Feasibility studies of rice peroxidase as a substitute for Horseradish peroxidase. ► Comparison of commercially available HRP with purified RP in organic solvents. ► Kinetics of RP with varying substrate concentrations, and % organic solvents. ► Conducting polymer immobilized RP/HRP for tetraguaiacol and dopamine estimation.

32 Optimization of solid-phase extraction using artificial neural networks and response surface methodology in combination with experimental design for determination of gold by atomic absorption spectrometry in industrial wastewater samplesOriginal Research Article Pages 211-217 H. Ebrahimzadeh, N. Tavassoli, O. Sadeghi, M.M. Amini

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Highlights

► Optimized by using artificial neural network and response surface methodology. ► Extraction and determination of gold ions in industrial water. ► Good correlation between data in the ANN, RSM and SVA.

33 Optical nanobiosensor: A new analytical tool for monitoring carboplatin–DNA interaction in vitroOriginal Research Article Pages 218-221 Amitkumar N. Lad, Y.K. Agrawal


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Highlights

► Proposed studies reveal the interaction of DNA with drug. ► Developed gold nanoparticle based optical Nanobiosensor for determination of drug–DNA interaction. ► When AuNPs labeled with DNA and exposed to drug solution, fluorescence enhancement observed. ► This is due to conformational change of DNA on binding of drug via FRET. ► This nanobiosensor can be widely useful in drug discovery and new drug development for DNA damage studies.

34 Determination of diethylstilbestrol in milk using carbon nanotube-reinforced hollow fiber solid-phase microextraction combined with high-performance liquid chromatographyOriginal Research Article Pages 222-228 Yang Yang, Juan Chen, Yan-Ping Shi


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Highlights

► Multi-walled carbon nanotubes were filled into the wall pores of hollow fiber using sol–gel technology. ► CNTs-HF was developed and used extract diethylstilbestrol in milk. ► This method was proved to be simple, rapid, economical, and ecological.

35 Multivariate optimization on flow-injection electrochemical hydride generation atomic absorption spectrometry of cadmiumOriginal Research Article Pages 229-234 M.H. Arbab-Zavar, M. Chamsaz, A. Youssefi, M. Aliakbari


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Highlights

► A new flow injection method by coupling to an ECHG with AAS was proposed for Cd. ► Experimental designs were applied to find a model for optimizing the technique. ► Analytical throughput rate was enhanced. ► Exchange of cathode after each measurement cycle was eliminated.

36 Optimized ultrasound-assisted emulsification microextraction for simultaneous trace multielement determination of heavy metals in real water samples by ICP-OESOriginal Research Article Pages 235-241 Hassan Sereshti, Yeganeh Entezari Heravi, Soheila Samadi


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Highlights

► Simultaneous trace determination of 12 heavy metals (Al, Bi, Cd, Co, Cu, Fe, Ga, In, Ni, Pb, Tl and Zn). ► Optimization and modeling the method by response surface design with the least experimental runs. ► Ultrasound assisted to speed up extraction at room temperature without any chemicals. ► APDC was used as the chelating agent to extract the metal ions into CCl4. ► Analysis by ICP-OES offered a fast multi-elemental

simultaneous analysis with an extended dynamic range.

37 Uncovering interactions in Plackett–Burman screening designs applied to analytical systems. A Monte Carlo ant colony optimization approachOriginal Research Article Pages 242-248 Alejandro C. Olivieri, Jorge F. Magallanes


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Highlights

► We developed a new algorithm for uncovering interactions in screening designs. ► It helps to correctly interpret analytical screening experiments. ► Simulated and experimental data support the usefulness of the procedure.

38 Fast screening of rice knockout mutants by multi-channel microchip electrophoresisOriginal Research Article Pages 249-255 He Nan, Sang-Won Lee, Seong Ho Kang


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Highlights

► Multi-channel microchip electrophoresis system was investigated for the first time for GM rice analysis. ► Fast variety identification and genotyping of GM rice were achieved with high sensitivity. ► Programmed field strength gradient was applied for fast analysis without any loss of resolving power and reproducibility.

39 A new method for quantifying N-nitrosamines in wastewater samples by gas chromatography—triple quadrupole mass spectrometryOriginal Research Article Pages 256-261 Suchul Yoon, Norihide Nakada, Hiroaki Tanaka


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Highlights

► We find the appropriate alternative internal standards for each N-nitrosamine (NA). ► We developed a methodology for separation, identification, quantification of NAs. ► We have high recoveries of internal standards for 8 NAs, even in wastewaters. ► A new developed method will be helpful to apply to the wastewater samples.

40 Immunochromatographic assay of cadmium levels in oystersOriginal Research Article Pages 262-266 Kosuke Nishi, In-Hae Kim, Takaaki Itai, Takuya Sugahara, Haruko Takeyama, Hideo Ohkawa


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Highlights

► Oysters are one of foodstuffs containing a relatively high amount of Cd. ► An ICA method of Cd levels in oysters was established. ► A Cd-spiked test showed favorable recovery from oysters by ICA method. ► Measured Cd levels in oysters in ICA method were correlated with those in ICP-MS. ► Established ICA method is adequate and reliable for measuring Cd levels in oysters.

41 Simple flow injection for screening of total antioxidant capacity by amperometric detection of DPPH radical on carbon nanotube modified-glassy carbon electrodeOriginal Research Article Pages 267-272 M. Amatatongchai, S. Laosing, O. Chailapakul, D. Nacapricha


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Highlights

► A new FI method was proposed for measuring ‘total antioxidant capacity’ or TAC of

vegetable extracts. ► We employed CNT to improve the sensitivity of DPPH• amperometric detection on glassy carbon electrode. ► The developed method is applicable to all types of plant extracts.

42 Determination of chemical oxygen demand by a flow injection method based on microwave digestion and chromium speciation coupled to inductively coupled plasma optical emission spectrometryOriginal Research Article Pages 273-278 César A. Almeida, Patricia González, Miguel Mallea, Luis D. Martinez, Raúl A. Gil


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Highlights

► New insights in the determination of COD in water samples are introduced. ► This is a low-sample handling strategy that proposes an in-flow microwave digestion. ► This method is inching to column solid phase extraction with activated carbon. ► This FI-

SPE method enables de determination of samples with high Cl− concentration. ► A noticeably reduction in time and wastes of analysis are remarked.



43 Rapid analysis of chlorinated anilines in environmental water samples using ultrasound assisted emulsification microextraction with solidification of floating organic droplet followed by HPLC-UV detectionOriginal Research Article Pages 279-284 Abilasha Ramkumar, Vinoth Kumar Ponnusamy, Jen-Fon Jen


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Highlights

► Developed a rapid method for the analysis of chlorinated anilines in waters. ► This method requires only small volume of low toxicity extraction solvent. ► This approach proved to serve as a simple, inexpensive and eco-friendly method.

44 In situ digestion for the determination of Ca in beverages by tungsten coil atomic emission spectrometryOriginal Research Article Pages 285-290 Luana N. Santos, Mário H. Gonzalez, Monise F. Moura, George L. Donati, Joaquim A. Nóbrega


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Highlights

► Ca is determined in juice, mineral and coconut water samples. ► Tungsten filament is used to digest the sample, atomize and excite the analyte. ► Atomizer extracted from inexpensive, commercially available projector light bulbs. ► In situ digestion on the atomizer with HNO3 and H2O2. ► Significant improvements in accuracy while applying

the in situ digestion.

45 Simultaneous voltammetric determination of synthetic colorants in food using a cathodically pretreated boron-doped diamond electrodeOriginal Research Article Pages 291-297 Roberta A. Medeiros, Bruna C. Lourencao, Romeu C. Rocha-Filho, Orlando Fatibello-Filho


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Highlights

► Tartrazine –TT, sunset yellow –SY, and brilliant blue –BB colorants are determined. ► Voltammetry is used to simultaneously determine TT and SY or BB and SY. ► A cathodically pretreated BDD electrode and DPV were used to develop a novel method. ► The analytical method was used in the determination of the colorants in food products. ► The results obtained with the novel method were similar to those obtained using HPLC.

46 Application of near infrared spectroscopy technology for the detection of fungicide treatment on durum wheat samplesOriginal Research Article Pages 298-302 M. Soto-Cámara, A.J. Gaitán-Jurado, J. Domínguez


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Highlights

► NIR as a durum wheat fungus infection detector. ► Discrimination between samples with fungus treatment. ► Capability of NIR to discriminate with an accuracy of 84% of well classification.

47 Inductively coupled plasma mass spectrometry in comparison with neutron activation and ion chromatography with UV/VIS detection for the determination of lanthanides in plant materialsOriginal Research Article Pages 303-311 Ewa Bulska, Bożena Danko, Rajmund S. Dybczyński, Agnieszka Krata, Krzysztof Kulisa, Zbigniew Samczyński, Marcin Wojciechowski


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Highlights

► Analytical protocol for the accurate determination of lanthanides in plants was proposed. ► Evaluation of the analytical performance of ICP-MS, NAA and IC UV/VIS was presented. ► Sample preparation for ICP-MS determination of lanthanides has been characterized. ► Tentative recommended values (TRV's) for lanthanides, which were not certified in selected CRM were established.

48 Mechanism change in estimating of antioxidant activity of phenolic compoundsOriginal Research Article Pages 312-317 Andrzej L. Dawidowicz, Małgorzata Olszowy

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Highlights

► The influence of buffer components on the estimation of antioxidant activity is presented. ► The change of mechanism scavenging process with the change of pH is discussed. ► The paper describes the impact of metal ions on the blocking of the scavenging process of DPPH. ► The discussion is based on the results obtained for the

exemplary DPPH•/BHT system.

49 Humidity effect on ammonia sensing properties of substituted and unsubstituted cobalt phthalocyaninesOriginal Research Article Pages 318-324 Thibaut Sizun, Marcel Bouvet, Jean-Moïse Suisse


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Highlights

► We developed ammonia sensors based on phthalocyanine materials. ► We study the ammonia-humidity interference. ► Response of CoPc to NH3 was stable in a wide

range of relative humidity.

50 Differentiation of mangoes (Magnifera indica L.) conventional and organically cultivated according to their mineral content by using support vector machinesOriginal Research Article Pages 325-330 C. Hernández-Sánchez, G. Luis, I. Moreno, A. Cameán, A.G. González, D. González-Weller, A. Castilla, A. Gutiérrez, C. Rubio, A. Hardisson


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Highlights

► Concentration of Ca, Co, Cu, Fe, K, Mg, Mn, Na, Ni and Zn in mangoes were obtained by AAS. ► The aim of this job was to differentiate between conventional and organic cultivating. ► Pattern recognition classification procedures were applied for discriminating purposes. ► LDA and SVM allows to a classification performance of 73% and 93% of prediction ability.

51 Colorimetric detection of Mn2+ using silver nanoparticles cofunctionalized with 4-mercaptobenzoic acid and melamine as a probeOriginal Research Article Pages 331-335 Ying Zhou, Hong Zhao, Chang Li, Peng He, Wenbo Peng, Longfei Yuan, Lixi Zeng, Yujian He


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Highlights

► The AgNPs was modified with 4-mercaptobenzoic acid and melamine. ► The –COOH of 4-mercaptobenzoic acid and −NH2 of melamine can form a six-coordinated

structure with Mn2+. ► The cofunctionalized AgNPs showed excellent selectivity for

Mn2+. ► The detection limit of Mn2+ was as low as 5 ×10−8 M by the cofunctionalized AgNPs.

52 Nanobeads-based rapid magnetic solid phase extraction of trace amounts of leuco-malachite green in Chinese major carpsOriginal Research Article Pages 336-342 Liang Guo, Jianwen Zhang, Hua Wei, Weihua Lai, Zoraida P. Aguilar, Hengyi Xu, Yonghua Xiong


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Highlights

► Oleic acid coated magnetic nanobeads as solid phase extraction material. ► Extract trace amounts of leuco-malachite green (LMG) from fishery samples. ► Adsorption isotherm model described as Freundlich adsorption isotherm. ► Enrichment efficiency for trace amounts of LMG (less than 0.5 ng/g).

53 A simple sensitive colorimetric/fluorometric probe for iodideOriginal Research Article Pages 343-348 Yang Zhao, Liang Yao, Ming Zhang, Yuguang Ma


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Highlights

► We have synthesized a simple oligomer (OCZ) with peripheral carbazole side chains. ► As a colorimetric probe, the color change is observed at a very low concentration. ► It shows high fluorescence quenching sensitivity and selectivity towards iodide.

54 Ionic liquids with amino acids as cations: Novel chiral ligands in chiral ligand-exchange capillary electrophoresisOriginal Research Article Pages 349-354 Xiaoyu Mu, Li Qi, Haizhi Zhang, Ying Shen, Juan Qiao, Huimin Ma


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Highlights

► AAILs with l-Pro as cations were explored as novel ligands in CLE-CE system. ► AAILs showed significant superiority over the common AA ligands in chiral separation by CLE-CE method. ► Discussion on the mechanism of AAILs as chiral ligands was presented.

55 Determination of n-octanol/water partition coefficients of weak ionizable solutes by RP-HPLC with neutral model compoundsOriginal Research Article Pages 355-361 Shu-ying Han, Jun-qin Qiao, Yun-yang Zhang, Hong-zhen Lian, Xin Ge


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Highlights

► Feasibility of neutral model compounds was studied for modified Collander equation. ► A unit slope with invariant intercept was theoretically proved in Collander equation. ► Experimental log Kow of aristolochic acids I and II were first reported.

56 Screening α-glucosidase inhibitors from mulberry extracts via DOSY and relaxation-edited NNROriginal Research Article Pages 362-367 Qian Shang, Jun-Feng Xiang, Ya-Lin Tang


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Highlights

► Our strategy can screen the inhibitors of α-glucosidase in mixtures. ► As long as the resonance(s) of ligand(s) can be detected by NMR, the ligand(s) could be identified. ► The process is time saving and labor saving. ► Our strategy can discover minor active components which may be lost in separation process.

57 A SERS and fluorescence dual mode cancer cell targeting probe based on silica coated Au@Ag core–shell nanorodsOriginal Research Article Pages 368-375 Shenfei Zong, Zhuyuan Wang, Jing Yang, Chunlei Wang, Shuhong Xu, Yiping Cui


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Highlights

► A metal-organic-QD hybrid nanoprobe is synthesized for cancer cell targeting. ► Its SERS and fluorescence can be switched by changing the exciting wavelength. ► It is advantageous for multi-component tracking due to QD's narrow emission bands. ► Au@Ag nanorods exhibit much stronger SERS enhancement than Au nanorods. ► It can target cancer cells with overexpressed folate receptors by two mode images.

58 The dual role of deposited microbead plug (DMBP): A blood filter and a conjugate reagent carrier toward point-of-care microfluidic immunoassayOriginal Research Article Pages 376-381 Chunyu Li, Chong Liu, Zheng Xu, Jingmin Li


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Highlights

► A DMBP with the dual roles: a blood filter and a conjugate reagent carrier. ► DMBP is fabricated by the use of natural deposition of beads. ► Conjugate reagents are incorporated during the assembly of the DMBP. ► Dry conjugate reagents enable to be released from the DMBP in a controlled manner. ► Their activities are retained after 60 days of storage at the room temperature.

59 On-line extractive separation in flow injection analysis based on polymer inclusion membranes: A study on membrane stability and approaches for improving membrane

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permeabilityOriginal Research ArticlePages 382-387 Lujia L. Zhang, Robert W. Cattrall, Muthupandian Ashokkumar, Spas D. Kolev


Highlights

► A flow injection setup with polymer inclusion membrane based separation is studied. ► Increasing the temperature leads to higher sensitivity and sampling rate. ► Sonication produces a modest increase in sensitivity. ► Membrane liquid phase leaches into the adjacent aqueous phase(s). ► Membrane liquid phase leaching continues until a stable composition is reached.

60 Simple and rapid colorimetric detection of Hg(II) by a paper-based device using silver nanoplatesOriginal Research Article Pages 388-394 Amara Apilux, Weena Siangproh, Narong Praphairaksit, Orawon Chailapakul


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Highlights

► A simple and rapid colorimetric method for the detection of Hg(II) has been developed. ► Ag nanoplates (AgNPls) on a paper-based device have been used for the determination of Hg(II). ► The proposed pre-concentration method shows high improvement of sensitivity. ► The addition of Cu(II) to the system has been found to enhance the Hg(II) signal. ► The proposed method has been successfully employed to determine Hg(II) in real samples.

61 Thermospray flame furnace atomic absorption spectrometry for determination of silver in biological materialsOriginal Research Article Pages 395-399 Fabiana Gerondi, Marco Aurélio Zezzi Arruda


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Highlights

► A method for silver determination in biological materials was described. ► The TS-FF-AAS technique was used for this purpose. ► No concentration step was necessary for this task. ► Certified reference materials and alternative technique were used for checking the accuracy of the method. ► The method presents easy and cheap implementation.

62 Combined corona discharge and UV photoionization source for ion mobility spectrometryOriginal Research Article Pages 400-405 Hamed Bahrami, Mahmoud Tabrizchi


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Highlights

► An IMS equipped with two ion sources, UV and corona discharge, has been designed. ► Combination of two sources broadens the range of chemicals to be analyzed by IMS. ► The two ion sources can operate simultaneously. ► Accurate comparison of the peaks in the spectra of each source is possible.

63 Conjugates of graphene oxide covalently linked ligands and gold nanoparticles to construct silver ion graphene paste electrodeOriginal Research Article Pages 406-413 Chunli Yang, Yaqin Chai, Ruo Yuan, Wenju Xu, Ting Zhang, Feng Jia


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Highlights

► A novel graphene hybrid material was synthesized. ► Material decorated with gold

nanoparticles was used for constructing Ag+ sensor. ► Sensor showed high sensitivity

and selectivity to Ag+. ► Immobilizing ligands on graphene overcame the ligands loss from the electrode.

64 Critical assessment of graphene as ion-to-electron transducer for all-solid-state potentiometric sensorsOriginal Research Article Pages 414-419 Ewa Jaworska, Wiktor Lewandowski, Józef Mieczkowski, Krzysztof Maksymiuk, Agata Michalska


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Highlights

► Carboxy-functionalized graphene was used as a solid contact for K-selective electrodes. ► Analytical performance was compared with that of typical conducting polymers transducers. ► It was found that all sensors tested were characterized with similar analytical parameters.

65 Separation of olive proteins by capillary gel electrophoresisOriginal Research Article Pages 420-424 Cristina Montealegre, Maria Concepción García, Carmen del Río, Maria Luisa Marina, Carmen García-Ruiz


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Highlights

► First time capillary gel electrophoresis applied to olive proteins. ► Seven common peaks identified in the olive varieties. ► Discriminant analysis for varieties classification according to geographical origin.

66 HRMAS NMR as a tool to study metabolic responses in heart clam Ruditapes decussatus exposed to Roundup®Original Research Article Pages 425-431 H. Hanana, G. Simon, N. Kervarec, B.A. Mohammadou, S. Cérantola


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Highlights

► Roundup® exposure induces anaerobiosis in clam Ruditapes decussatus. ►

Anaerobiosis is time and dose dependent to Roundup® exposure. ► Phosphoarginine

and ATP level are dependent to Roundup® concentration. ► Bioaccumulation of glyphosate and isopropylamine in clam was observed. ► HRMAS NMR is an effective

tool to elucidate toxicological mechanisms of Roundup®.

67 Use of flat-sheet membrane extraction with a sorbent interface for solvent-free determination of BTEX in waterOriginal Research Article Pages 432-437 Hekap Kim, Seyoung Kim, Soohyung Lee


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Highlights

► Determination of BTEX in water using flat-sheet MESI coupled to GC–MS was established. ► The optimum flow rates of the donor and acceptor phases were set at

1.5 and 55 ml min−1, respectively. ► The single pass of the sample showed satisfactory QA/QC data. ► Advantage of rapidity, simplicity, and ready extendibility to automated on-line monitoring.

68 Efficient immobilization of glucose oxidase by in situ photo-cross-linking for glucose biosensingOriginal Research Article Pages 438-444 Guanglei Fu, Zhifei Dai


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Highlights

► Prussian blue-carbon nanotubes acted as the backbone for enzyme assembly. ► Enzyme was immobilized by combination of self-assembly with photo-cross-linking. ► Efficient enzyme immobilization by the strategy led to high biosensing stability.

69 Compound-specific isotope analysis for aerobic biodegradation of phthalate acid estersOriginal Research Article Pages 445-449 Xuewei Peng, Xianguo Li


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Highlights

► PAEs degraded by mixed microbial populations in natural marine sediment. ► Evaluation of the biodegradation of PAEs using compound-specific isotope analysis. ►

Purification of sediment samples for isotope analysis. ► Relationship between 13C isotopic enrichment and molecular structure.

70 Direct determination of deuterium of wide concentration range in water by Nuclear Magnetic ResonanceOriginal Research Article Pages 450-455 Xiaomin Ma, Pengchi Deng, Xiaoyan Wang, Chunchun Zhang, Xiandeng Hou

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Highlights

► A direct assay of detecting deuterium concentration was described and validated. ► This method was simple, rapid, sensitive, little sample preparation and green. ► The detection range was wide: from natural abundance to nearly 100%.

71 Novel chitosan-based fluorescent materials for the selective detection and adsorption of Fe3+ in water and consequent bio-imaging applicationsOriginal Research Article Pages 456-461 Qingtao Meng, Weiping Su, Cheng He, Chunying Duan


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Highlights

► Both water-soluble materials L-CS-Fluo and L-CS-Cb feature highly selective

fluorescence response to Fe3+ in environment and biological fields. ► The water-insoluble chitosan-based materials H-CS-Fluo and H-CS-Cb take on doubled absorptivity compared to free chitosan and could be regenerated by treating with EDTA.

72 Simultaneous determination of three β-blockers at a carbon nanofiber paste electrode by capillary electrophoresis coupled with amperometric detectionOriginal Research Article Pages 462-467 Lei Xu, Qiaohui Guo, Huan Yu, Jianshe Huang, Tianyan You


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Highlights

► Carbon nanofibers were produced by electrospinning technique. ► A carbon nanofiber paste electrode was fabricated by this electrospun material. ► This electrode was firstly used as a sensitive amperometric detector in CE. ► Proposed method was applied to determine three β-blockers in human urine.

73 Evaluation of industrial cutting fluids using electrochemical impedance spectroscopy and multivariate data analysisOriginal Research Article Pages 468-472 Christian Ulrich, Louthander Dan, Per Mårtensson, André Kluftinger, Michael Gawronski, Fredrik Björefors


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Highlights

► Interpretation of impedance data via multivariate data analysis. ► Identification of vital frequency regions for parameter discrimination. ► Simultaneous estimation of concentration and pH.

74 Rapid assessment of endpoint antioxidant capacity of red wines through microchemical methods using a kinetic matching approachOriginal Research Article Pages 473-483 Luís M. Magalhães, Luísa Barreiros, Miguel A. Maia, Salette Reis, Marcela A. Segundo


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Highlights

► A novel kinetic matching approach is proposed to foster rapid assessment of total (endpoint) antioxidant capacity of food samples. ► By selecting a compound with an oxidation kinetic profile similar to that shown by sample it is not necessary to achieve endpoint conditions. ► The analysis time (60 to 300 min at endpoint conditions) was

reduced to <10 min for F–C, CUPRAC, DPPH• and ABTS•+ assays. ► The antioxidant values obtained with the kinetic matching standard were converted to a common standard, providing an universal way for expression of results.

75 Biotin determination in food supplements by an electrochemical magneto biosensorOriginal Research Article Pages 484-490 Silvina V. Kergaravat, Gabriel A. Gómez, Silvia N. Fabiano, Tamara I. Laube Chávez, María I. Pividori, Silvia R. Hernández


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Htghlights

► Horseradish peroxidase activity was related to biotin amount. ► The response was obtained by square wave voltammetry. ► Magnetic beads modified with streptavidin were used and captured by a magneto electrode. ► Biotin-fortified real samples were analyzed by electrochemical magneto sensor.

76 Measurement of yunaconitine and crassicauline A in small-volume blood serum samples by LC–MS/MS: Tracing of aconite poisoning in clinical diagnosisOriginal Research Article Pages 491-498 Karen Ka-Wing Chung, Sammy Pak-Lam Chen, Sau-Wah Ng, Tony Wing-Lai Mak, Kelvin Sze-Yin Leung


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Highlights

► New LC–MS/MS method for yunaconitine and crassicauline A detection in blood matrix. ► High method specificity can reduce endogenous and exogenous interference. ► Results showed that this method can be utilized in clinical routine applications.

77 Novel automated flow-based immunosensor for real-time measurement of the breast cancer biomarker CA15-3 in serumOriginal Research Article Pages 499-504 Ibrahim A. Darwish, Tanveer A. Wani, Nasr Y. Khalil, Diane A. Blake


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Highlights

► In this study, we developed a novel immunosensor for measurement of CA15-3 in

serum. ► The sensor employed the kinetic-exclusion analysis using the KinExATM instrument. ► The sensor was able to accurately measure CA15-3 at concentrations as low as 0.2 IU/mL. ► The developed KinExA-based sensor is superior to the sandwich-ELISA. ► The sensor has a great value in accurate measurements of CA15-3.

78 Simultaneous determination of arsenic, cadmium, copper, chromium, nickel, lead and thallium in total digested sediment samples and available fractions by electrothermal atomization atomic absorption spectroscopy (ET AAS)Original Research Article Pages 505-512 María A. Álvarez, Génesis Carrillo


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Highlights

► Simultaneous determination of total and available content of heavy metals in

sediments by ET AAS. ► Optimization was performed using a 33 Box–Behnken factorial design. ► Conditions for analyzing matrices from the modified BCR scheme and total digestion were optimized. ► The method was validated using reference samples of sediment CRM NCS DC 73315, LKSD 4 and BCR-701. ► Time of analysis was significantly decreased and the method is useful for environmental research.

79 Cationic polyelectrolyte copolymer modified polyurethane foam for flow injection preconcentration and separation of trace amounts of β-lactam antibioticsOriginal Research Article Pages 513-520 S.M. Abdel Azeem, H.M. Kuss, M.F. El-Shahat


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Highlights

► Novel solid phase sorbent for selective preconcentration of β-lactam antibiotics. ► Improved limit of detection (compared to previous work ). ► Improved enrichment factor. ► Isocratic separation of studies antibiotics. ► Successful application to real samples with good recovery and precision.

80 Selective extraction and determination of vitamin B12 in urine by ionic liquid-based aqueous two-phase system prior to high-performance liquid chromatographyOriginal Research Article Pages 521-526 Paula Berton, Romina P. Monasterio, Rodolfo G. Wuilloud


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Highlights

► Fast and simple clean-up and extraction based on ATPS and ionic liquids. ► Selective determination of vitamin B12 with wide-spread instrumentation. ► Accurate



and reliable determination of vitamin B12 in urine samples. ► Environment friendly clean-up and extraction technique.

81 On-line measurement of perchlorate in atmospheric aerosol based on ion chromatograph coupled with particle collector and post-column concentratorOriginal Research Article Pages 527-532 Masaki Takeuchi, Kaoru Yoshioka, Yusuke Toyama, Ai Kagami, Hideji Tanaka


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Highlights

► The automated system was developed for measuring ClO4− in atmospheric aerosol.

► The sensitivity was increased 7.7 times with the post-column concentration

technique. ► The system provided the ClO4− concentration every 3 h with the LOD of

0.35 ng/m3.

82 Micrococcal nuclease detection based on peptide-bridged energy transfer between quantum dots and dye-labeled DNAOriginal Research Article Pages 533-538 Yanhong Chen, Lei Wang, Wei Jiang


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Highlights

► A fluorescence resonance energy transfer system based on electrostatic interaction was developed. ► The system was applied for the detection of micrococcal nuclease. ► This method did not require covalent modification to the quantum dots and doubly labeled DNA strand.

83 Identification of multiply charged proteins and amino acid clusters by liquid nitrogen assisted spray ionization mass spectrometryOriginal Research Article Pages 539-549 Suresh Kumar Kailasa, Nazim Hasan, Hui-Fen Wu


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Highlights

► We developed LNASI MS method for the identification of multiply charged proteins. ► Fine charge droplets are produced without voltage and heat. ► We studied effect of acids and solvent compositions on LNASI mass spectra. ► LNASI MS enables the detection of multiply charge states of cytochrome c at 400 nM.

84 Evaluation of a titanium dioxide-based DGT technique for measuring inorganic uranium species in fresh and marine watersOriginal Research Article Pages 550-556 Colin M. Hutchins, Jared G. Panther, Peter R. Teasdale, Feiyue Wang, Ryan R. Stewart, William W. Bennett, Huijun Zhao


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85 Electrochemical detection of dopamine in the presence of ascorbic acid using PVP/graphene modified electrodesOriginal Research Article Pages 557-562 Qin Liu, Xu Zhu, Zhaohui Huo, Xulun He, Yong Liang, Maotian Xu


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Highlights

► PVP/GR/GCE showed good sensitivity, selectivity and reproducibility towards the detection of DA. ► The modified electrode can eliminate the interference of AA, UA and some co-existing substances. ► The modified electrode can determine DA in urine and human serum samples without pretreatment.

Short Communications

86 A novel reverse phase stability indicating RP-UPLC method for the quantitative determination of fifteen related substances in Ranolazine drug substance and drug product Pages 563-573 Vakamulla Malati, Anumala Raghupati Reddy, K. Mukkanti, M.V. Suryanarayana


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Highlights

► Separation of 15 process related impurities with in 15 min. ► New stability indicating method for Ranolazine by using UPLC. ► Method has capability of separating major oxidative degradant di-N-Oxide impurity. ► New method for the separation of regio isomers of Ranolazine. ► designed to determine impurities in drug substance as well as in the drug product.

87 Application of TLC and LA ICP SF MS for speciation of S, Ni and V in petroleum samples Pages 574-578 Nopparat Vorapalawut, Mauro Martinez Labrador, Pawel Pohl, Manuel Caetano, Jose Chirinos, Carine Arnaudguilhem, Brice Bouyssiere, Juwadee Shiowatana, Ryszard Lobinski


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Highlights

► S, Ni, V rapid speciation in crude oil sample. ► Thin layer chromatography analysis by LA ICP MS. ► Metals compounds speciation linked to their polarity in organic sample.

88 Screening analysis of biodiesel feedstock using UV–vis, NIR and synchronous fluorescence spectrometries and the successive projections algorithm Pages 579-583 Matías Insausti, Adriano A. Gomes, Fernanda V. Cruz, Marcelo F. Pistonesi, Mario C.U. Araujo, Roberto K.H. Galvão, Claudete F. Pereira, Beatriz S.F. Band


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Highlights

► Fast and nondestructive classification of biodiesel with respect to oil source is carried out. ► UV–vis, near infrared and synchronous fluorescence spectrometries are used. ► Corn-based biodiesel is discriminated from other biodiesel types. ► The Successive Projection Algorithm is employed to select suitable spectral variables. ► Variable selection is key to the correct classification of all samples.

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