Page 225 - Advances in Forensic Applications of Mass Spectrometry - Jehuda Yinon

1522_book.fm Page 198 Thursday, November 13, 2003 9:58 AM

EI/MS/MS Level of Detection (ng) 0.642 0.002 0.019 0.020 0.568 0.004 0.002 0.289 0.023 0.148 0.316 0.156 0.002 0.078 0.004 0.080 0.115 0.024 0.063 0.074 0.038 0.039
Comparison of the Sensitivity between MS and MS/MS for Many of the Target Compounds Used in Fire Debris

EI/MS Level of Detection (ng) 0.040 0.021 0.034 0.036 0.020 0.016 0.011 0.013 0.017 0.009 0.004 0.004 0.007 0.005 0.009 0.002 0.003 0.002 0.001 0.001 0.001 0.001

Excitation Amplitude (V) 0.0 51.5 52.5 50.5 0.0 43.0 49.0 0.0 50.0 43.0 0.0 0.0 53.0 0.0 53.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Excitation Storage Level (m/z) 37 48 48 48 37 48 48 37 48 48 37 37 48 37 48 37 37 37 37 37 37 37

Parent Ion (m/z) 115 106 106 106 129 120 120 143 121 134 157 171 143 185 143 199 213 227 241 268 255 283

Formula C 8 H 18 C 8 H 10 C 8 H 10 C 8 H 10 C 9 H 20 C 9 H 12 C 9 H 12 C 10 H 22 C 9 H 12 C 10 H 14 C 11 H 24 C 12 H 26 C 13 H 28 C 11 H 10 C 11 H 10 C 14 H 30 C 15 H 32 C 16 H 34 C 17 H 36 C 19 H 40 C 18 H 38 C 20 H 42

Molecular Weight (g/mol) 114.23 106.17 106.17 106.17 128.26 120.19 120.19 142.28 120.19 134.22 156.31 170.33 184.36 142.20 142.20 198.39 212.41 226.44 240.47 268.52 254.49 283.60 Detection limits are determined as 3 times S/N.

Compound 1,2,4-trimethylbenzene 1,2,3-trimethylbenzene 2-methylnaphthalene 1-methylnaphthalene © 2004 by CRC Press LLC

Table 5.2 Analysis n-octane ethylbenzene p-xylene o-xylene n-nonane cumene n-decane p-cymene n-undecane n-dodecane n-tridecane n-tetradecane n-pentadecane n-hexadecane n-heptadecane pristine n-octadecane phytane Note: