Post on 28-Dec-2015
What is analytical chemistry?
• 5 subdisciplines of chemistry
• Some definitions
• In every day life…
• Analytical chemist versus chemical analyst
“My” steps1. Formulate the question2. Select analytical
procedures3. Sampling**
• “Representative” sample• Homogeneous versus
heterogeneous
4. Sample Preparation**Most analyses require a liquid solution:
• Extraction• Digestion
4. Analysis• What type of analysis?
6. Manipulate data• Statistical analysis
7. Interpret results/draw conclusions
8. Communicate results
Types of Analyses
1. Qualitative analysis
2. Quantitative analysis
3. Characterization analysis
4. Fundamental analysis
Some Terminology
• Analyte
• Matrix
• Analysis – Measurement – Determination
• Technique – Method – Procedure – Protocol
Classifying Techniques
• All analyses based on a signal
• Total Analysis Technique – AKA “Classical Method”
• Concentration Technique – AKA “Instrumental Method”
Method Considerations:Analytical Figures of Merit (AFOMs)
• Accuracy• Precision• Sensitivity• Selectivity• Robustness
• Ruggedness• Scale of operation,• Analysis time• Availability of
equipment• Cost
Relevant Reading
• Chpt 1 all• Chpt 3 to 3C
• Chpt 2 (review)