Page 241 - Advances in Forensic Applications of Mass Spectrometry - Jehuda Yinon

1522_book.fm Page 214 Thursday, November 13, 2003 9:58 AM

Chromatogram Plots
File: I:\data0999\15704 ms2.ms
Sample: 10.0 MIN SAMPLING TIME, 5 MINDESORB, GB 16/9/99 10:37 AM
Sample Notes: RN0391-01, 99-0817-F #1, STAIR TREADS - GC/MS/MS - GB
Operator: D.SUTHERLAND Scan Range: 1-1034 Time Range: 0.02 - 15.00 min.
Slecl 1 7.099 m In. Scan: 343 Chan: 1 Ion: NARIC: 12512
B P 131 (3894-100%) 15704 ms2.ms 131
100%
75% 119
50%
105
25% 91
57 75 84 147 165 181 194 202
0%
Slecl 2 8.126 m In. Scan: 385 Chan: 1 Ion: NARIC: 10869
B P 131 (2651-100%) 15704 m : 2.ms 131
100%
75% 105
50%
84 119
25% 91 146
0% 50 57 66 158 174 184 192 201 208
D Iff Slecl 1 Specl 2 7.099 m In. Scan: 343 Chan: 1 Ion: MARIC: 12512
100% Normalized 8.126 m In. Scan: 393 Chan: 1 Ion: MARIC: 10869
50%
0%
−50%
−100%
50 75 100 125 150 175 200 m/z
kCounts 15704 ms 2.ms Ions: 131 all
3
2
1
Counts 15704 ms 2.ms Ions: 146 all
700
600
500
400
300
200
100
6 7 8 9 minutes
2 3
289 338 387 433 Scans
Figure 5.18 Comparison of GC/MS/MS spectra for a third indane isomer: ion
ratios different.
Table 5.3 GC/MS/MS — Target Class Approach
Center of Window CID Example parent
parent ion Range Energy or daughter
window (m/z) (+/– m/z) (V) ion (m/z) Target chemical classes
71 3 8 71, 69 Alkanes, alkylcyclohexanes
106 5 35 91, 105 Alkylbenzenes
118 5 35 117, 118 Indanes, alkylbenzenes
133 5 35 119, 133 Alkylnaphthalenes, alkylbenzenes
145 7 40 141, 142, 145 Alkylbenzenes, indanes
158 5 35 154, 156 Alkylnaphthalenes, alkylbiphenyls
169 5 45 155, 170, 168 Indanes, alkylbiphenyls
183 5 40 156, 171 Alkylnaphthalenes, alkylanthracenes
that an ASTM method does not yet exist for GC/MS/MS as investigators and
reviewers are not familiar with this method, and that there needs to be an
adequate time of comparison of the method with the current benchmark of
GC/MS.
A single GC/MS/MS method can be used to analyze fire debris as is being
discussed in a sub-committee of ASTM E30.01 that is charged with the review

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