PerkinElmer: A Novel High Sensitivity Mass Spectrometric Detector for Gas Chromatography
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Transcript of PerkinElmer: A Novel High Sensitivity Mass Spectrometric Detector for Gas Chromatography
11 © 2009 PerkinElmer
Andrew Tipler, Frank De Lorenzo,
Ruben Garnica, Yury Kaplan, Dawn
May
PerkinElmer Inc., Shelton Ct
A novel high sensitivity mass spectrometric detector for gas chromatography
22
Goals
Present a GC/MS with novel ion source and detector design.
Provide experimental results from both environmental and food applications.
33
Introduction
• Overview of general analytical system
• Ion source
• Detector
• Analytical results
• Performance standard - OFN
• SVOA by 8270D (environmental application)
• Pesticides by AOAC 2007.1 (food application)
• VOC by 8260C (environmental application)
• Conclusions
44
The GC/MS System
Clarus 680 GCSQ 8 MS
55
The GC/MS System
SQ 8 MS
Clarus 680 GCDual channel GC
Low thermal mass oven
PPC gas control
Programmable split/splitless injectors
66
The GC/MS System
SQ 8 MSHeated transfer line
Removable ion source
Quadrupole with pre-quad filters
Noise cancelling detector optics
Electron multiplier based detection
Clarus 680 GCDual channel GC
Low thermal mass oven
PPC gas control
Programmable split/splitless injectors
77
SMARTsource – Quick Change Capabilities
Novel grooved cam-locked design for
quick removal and insertion improves
usability and
88
Removal and Insertion of the Source With No Tools
99
Ion source yoke with quick connect electronics
Quick Connect plug
Guide pins
Yoke receptacle
1010
Quick change ion source – flame retardant analysis
…analysis by Positive CI…
From a single sample…
…without the need to reprep the sample.
…followed by EI…
1111
Quick change ion source
1212
Electron Multiplier based ion detector
Noise reducing detector design
• Novel ion optics
• Advanced material
• Discrete EM for max gain
Benefits
• Enhanced sensitivity
• Operational flexibility
1313
EM Detector – Design
Conversion Dynode
Grounded entrance plate
Advanced Ion
Optics
270º ion path
Discrete electron multiplier
1414
EM Detector – Function
Neutrals filtered
Unwanted charged ions filtered
1515
Clarifi Detector – Ion Simulation
1616
Setting EM Voltage – Wide Functional Range
0.0E+00
1.0E+07
2.0E+07
3.0E+07
4.0E+07
5.0E+07
6.0E+07
1160 1260 1360 1460 1560 1660 1760 1860
Inte
nsi
ty o
f N
aph
thal
ene
(m/z
= 1
28)
Multiplier (V)
1717
Analytical Results
Test Standard
(Octafluoronaphthalene)
1818
Maximum Sensitivity – OFN Standard
, 09-May-2011 + 14:11:36
4.75 5.75 6.75 7.75 8.75Time0
100
%
0
100
%
0
100
%
648N1042202_1pg ofn 17 1: Scan EI+ 272
2.03e6S/N:RMS=1176.27
648N1042202_1pg ofn 16 1: Scan EI+ 272
2.03e6S/N:RMS=1148.58
648N1042202_1pg ofn 15 1: Scan EI+ 272
2.03e6S/N:RMS=1526.68
Sensitivity Measurements
• 1 pg/ L OFN
• 1 L pressure pulse injection
• Scanning m/z = 50 – 300
> 800:1 s/n (RMS)
1919
Analytical Results
SVOA by GC/MS
EPA 8270D
2020
SVOA by GC/MS
Standard US EPA Method 8270D
• Extraction of solid waste samples (among others)
• Analysis by liquid injection GC/MS
• Tens to hundreds of target compounds
Experiment Focus
• Optimize EM setting for maximum dynamic range
Method
• Standard EPA 8270D methodology followed
• Mega Mix with internal standards
2121
SVOA by GC/MS – example chromatogram (40 g/mL)
3.00 5.00 7.00 9.00 11.00 13.00 15.00 17.00 19.00Time0
100
%
Scan EI+ TIC63
43
3623
20
2
1
12
8
18
27
24
29
5754
46
52
47
4856
62
60
59
71
67
65
69
72
53
66
68
58
55
51
50
30
31
25
32
38
4115
16
17
13
10
28
2222
Average %RSD ~ 11%
(all 78 compounds)
SVOC by GC/MS – Calibration Results (1-150 g/mL)
# CompoundRT
(min)Average RRF RRF %RSD
1 Pyridine 3.09 0.2 8.98
2 Aniline 4.44 1.2 13.16
4 N-Nitrosodimethylamine 4.45 0.1 10.3
26 Naphthalene 6.24 1.1 9.63
27 Hexachlorobutadiene 6.39 0.2 10.38
42 2,4- Dinitrophenol 8.60 0.1 8.17
49 Fluorene 9.15 1.3 11.93
57 Pentachlorophenol 10.18 0.1 8.01
64 Pyrene 12.26 1.2 9.62
67 Benzo[a]anthracene 13.89 1.0 11.8
70 Bis (2-ethylhexyl) phthalate 13.98 0.6 17.47
74 Benzo[a]pyrene 16.29 1.0 9.46
2323
Analytical Results
Pesticides by GC/MS
AOAC 2007.1
2424
AOAC 2007.1
• Association of Analytical Chemists
• Pesticides in grapes, lettuces, tomatoes, oranges
• QuEChERS extraction (not performed)
Target
• Meet <10 ng/g method specification using SIFI
SIFI = simultaneous selected ion full scan
Success
• Good Chromatography
• +24 compounds meeting specs
Pesticides in Food – AOAC 2007.1
2525
Pesticides in Food – AOAC 2007.1
3.50 4.50 5.50 6.50 7.50 8.50 9.50 10.50 11.50 12.50 13.50 14.50 15.50 16.50 17.50 18.50 19.50Time0
100
%
110411_Pest_010
14.80
3.49
3.40
6.12
5.59
4.77
11.35
9.517.36
6.388.13
7.39
8.92
9.30
9.65
10.85
10.26
9.72
14.5712.27
11.43
15.71
14.98
15.59
17.61
16.2316.48
16.66
16.71
18.80
17.91
AnalyteRetention
TimeMethamidophos 3.40Dichlorovos (DDVP) 3.49Omethoate 6.12Demeton-s-methyl 6.38Dimethoate 7.36Dichloran 7.39Tefluthrin 8.13Tolclofos-methyl 8.92Pirimiphos-methyl 9.30Chlorpyrifos(Dursban) 9.65Pendimethalin 10.26Methidathion 10.85Tetrachlorvinphos 10.95Tokuthion 11.35Profenofos 11.43Ethion 12.27Azinphos methyl (guthion) 14.57L-Cyhalothrin 14.80Pyrazophos 14.98cis-Permethrin 15.59trans-Permethrin 15.71Cyfluthrin-1 16.12Cyfluthrin-2 16.23Cyfluthrin-3 16.28Cyfluthrin-4 16.33Cypermethrin-1 16.48Cypermethrin-2 16.59Cypermethrin-3 16.66Cypermethrin-4 16.71Fenvalerate-1 17.61Fenvalerate-2 17.91Deltamethrin 18.80
Organophosphorous Pesticides
Synthetic Pyrethroids
32 components – SIFI analysis in < 20min
2626
Pesticides in Food – AOAC 2007.1
On column Reporting Levels ng Methamidophos 0.02
Omethoate 0.04
Dimethoate 0.008
Dichloran 0.004
Tefluthrin 0.004
Azinphos methyl (guthion) 0.008
L-Cyhalothrin 0.016
Cis-Permethrin 0.04
Trans-Permethrin 0.02
Cyfluthrin-1 - 4 0.04
Cypermethrin-1 - 4 0.04
Fenvalerate 1-2 0.04
Deltamethrin 0.02
2727
Analytical Results
VOC by P&T GC/MS
EPA 8260C
2828
VOC by purge & trap GC/MS
Standard US EPA Method 8260C
• Extraction of solid waste samples (among others)
• Analysis by purge & trap GC/MS
• Tens to hundreds of target compounds
Experiment Focus
• Optimize EM setting for maximum dynamic range
Method
• Standard EPA 8260C methodology followed
• Mega Mix with internal standards
2929
VOC by purge & trap GC/MS – example chromatogram (40 g/mL)
1.00 3.00 5.00 7.00 9.00 11.00 13.00Time0
100
%
Scan EI+ TIC3.13e8
21
3
45
6
79 10
11
14
15
16
18
1719
22
26
23
29
31
32
34 3537
36
39
40
41
4243
44
45
47
48
4950
51
52
53
55
56 57
59
64
6871
76
73 74
78
79
80
83
84
81
3030
SVOC by GC/MS – Calibration Results (0.5-200 mg/L)
# COMPOUND
Avg
RRF %RSD
MDL
(mg/L)
Precision
%Rec
Accuracy
%RSD
3 Vinyl Chloride 0.79 8.2 0.21 95 1.8
14 trans-1,2 Dichloroethene 0.46 9.3 0.34 105 1.3
31 Benzene 1.33 6.9 0.22 90 1.6
35 Trichloroethene 0.32 8.9 0.28 103 2.5
36 1,2-Dichloropropane 0.47 6 0.15 96 1.8
43 Toluene 0.67 6.5 0.22 100 1.5
48 1,3-Dichloropropane 0.65 4.4 0.06 94 3.1
50 Ethylene Dibromide 0.40 3.6 0.07 111 2.8
52 Chlorobenzene 1.08 4.7 0.23 102 1.0
54 1,1,1,2-Tetrachloroethane 0.27 7.8 0.19 105 1.9
63 1,1,2,2-Tetrachloroethane 1.17 5.9 0.16 93 9.9
74 1,3-Dichlorobenzene 1.64 9 0.22 98 0.7
83 Naphthalene 3.60 7.3 0.06 102 2.4
84 1,2,3-Trichlorobenzene 1.13 7.2 0.09 94 1.6
Average %RSD ~ 8%
(all 80 compounds)
3131
VOC by Purge & Trap – EIC reproducibility at MDL
Extracted Ion of Naphthalene
@ m/z = 128
12.35 12.37 12.39 12.41 12.43 12.45 12.47 12.49 12.51 12.53 12.55Time0
100
%
Scan EI+ 128
1.12e6
0.5 g/L
%RSD = 3.8
3232
Conclusions
• PerkinElmer Clarus SQ 8 GC/MS
• SMARTsource for quick ion source change
• EM Detector for enhanced sensitivity and flexibility
• Analytical results
• Test Standards
• US EPA Method 8270D
• AOAC 2007.1 Pesticide analysis
• US EPA Method 8260C
3333
Thank you and acknowledgement to the SQ 8 team