Introduction to FIGAEROcires1.colorado.edu/jimenez-group/UsrMtgs/UsersMtg... · 'all (tic)' c 4 h 2...
Transcript of Introduction to FIGAEROcires1.colorado.edu/jimenez-group/UsrMtgs/UsersMtg... · 'all (tic)' c 4 h 2...
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Introduction to FIGAEROFilter Inlet for Gases and AEROsols
Penglin Ye, Andy Lambe, Mingyi Wang, Alex Vogel, Manjula Canagaratna, John Jayne, Douglas Worsnop
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Outline
• Background
• How it works
• Application examples
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Development of FIGAERO
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Gas Sampling & Filter Loading
Gas inlet pump
Aerosol inlet pump
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Filter Desorption
Gas inlet pump
Aerosol inlet pump
Hea
ted
zer
o N
2
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Filter Replacement
Pall, Zeflour 2 um pore size, p/n 60048
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EyeOn Control System
General Purpose Sequencing and Peripheral Controller and LoggerWrites data into HDF files
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What basic information can we get with FIGAERO?
Gas phase
• 1. Traditional CIMS measurement, compositions, concentrations……
Particle phase
• 2. Vaporization. Particle phase chemical information.
• 3. Thermogram. Volatility
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Gas phase measuring &
particle sampling (30 min)
Particle-phase thermal
desorption (15 min)
25 C
180 C
Heating begin
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11
HR-ToF-MS
FIGAERO Application, ambient
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HR-ToF-MS
FIGAERO Application, chamber
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Monomer C10
Dimer C20
Trimer C30
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HR-ToF-MS
FIGAERO Application, PAM (Potential Aerosol Mass)
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α-pinene + OH , particle phase
10-1
100
101
102
103
104
105
700600500400300200100
m/Q (Th)
α-pinene 100ppb,photochemical ageing a few days
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Major oxidation products in particle phase
8000
6000
4000
2000
0
ion
s/s
500480460440420400380360340320300280260240220200
m/Q (Th)
'all (TIC)'C4H2O4I-
C3H6O3I-
C3H4O4I-
C5H8O4I-
C5H8O5I-
C7H10O4I- C8H12O4I-
C8H12O5I- C10H16O4I-
C10H16O6I-
C10H16O5I-
C10H14O7I-
C10H14O8I-
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α-pinene + OH , gas phase
8000
6000
4000
2000
0
ion
s/s
500480460440420400380360340320300280260240220200
m/Q (Th)
'all (TIC)'
C7H10O4I-
C10H14O8I-
C10H14O7I-
C10H16O6I-
C10H16O5I-
C10H16O4I-
C8H12O5I-
C8H12O4I-
C5H8O5I-
C5H8O4I-
HNO6I-
C8H12O4(NO3)-
C3H6O3I-
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Comparing the MS of the gas and particle phase
-8000
-6000
-4000
-2000
0
2000
4000
6000
8000
500450400350300250200
Gas Phase
Paritcle Phase
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apinene + OH + NO Average MS during FIGAERO desorption, m/Q = 200 - 500
• C8H12O4-5 and C10H16,18O4-6
• C10H15,17NO6-9 organic nitrates
2.0x104
1.5
1.0
0.5
0.0
ion
s/s
/ns T
OF
500480460440420400380360340320300280260240220200m/Q (Th) (not auto-updated after calibration)
IN2O6-
I*C8H12O4-
I*C10H16,18O5-
I*C10H15NO6-
I*C10H16O6-
I*C10H15NO7-I*C10H15NO8-
I*C10H15NO9-
I*C8H12O5-
I*C10H16O4-
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Thermogram of the oxidation products
1.0
0.8
0.6
0.4
0.2
0.0
No
rm. si
gn
al
5:40 PM
2/16/2017
5:45 PM 5:50 PMUTC
'C10H16O4I-'
'C10H16O5I-'
'C10H16O6I-'
'C10H16O7I-'
'C10H16O8I-'
150
100
50
08:20 PM 8:22 PM
2/15/2017
8:24 PM 8:26 PM 8:28 PM 8:30 PM 8:32 PM 8:34 PM
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Summary
1. FIGAERO can provide compositions, concentrations and other chemical information of the organics in both gas phase and particle phase.
2. The desorption sequence of the oxidation products demonstrate the volatility difference.