Page 274 - Advances in Forensic Applications of Mass Spectrometry - Jehuda Yinon

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2,4,6-TNT
2,3,4-TNT
× 50 m/z 227
3,4,5-TNT
m/z 227
Mass Range
225.5 - 226.5+
226.5 - 227.5

2,4-DNT
× 5
m/z 182

Mass Range
181.5 - 182.5

× 10

Mass Range
212.5 - 213.5

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30

Figure 6.10 LC/MS-APCI mass chromatograms of a TNT sample from Canada
(Reprinted from Zhao, X. and Yinon, J., Characterization and origin identification
of 2,4,6-trinitrotoluene through its by-product isomers by liquid chromatography
– atmospheric pressure chemical ionization mass spectrometry, J. Chromatogr.
A, 946, 125, 2002. Copyright 2002, with permission from Elsevier.)

were dissolved in acetone and diluted in an isopropanol–water (50:50) solu-
tion with 0.1% ammonium hydroxide.
The major ions in the ESI mass spectrum of picramide are the [M – H] –
and M ions, at m/z 227 and 228, respectively, and the adduct ion at m/z 285,
–
[M + CH COCH – H] , due to the acetone solvent. The ESI mass spectrum
–
3 3
of TNC consists mainly of one ion, the [M – H] ion at m/z 242. The ESI
–
mass spectrum of tetryl consisted of the adduct ion [M + CH COCH – H] –
3 3
at m/z 344 and the ion at m/z 241, which is the [M – H] ion of N-
–
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