Page 23 - Advances in Forensic Applications of Mass Spectrometry - Jehuda Yinon
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1522_C01.fm  Page 10  Tuesday, December 2, 2003  10:05 AM








































                             Figure 1.4  Unknown mass spectrum underlying the peak 3 in Figure 1.1 (upper
                             part), the reference spectrum (middle part), and the structure and the hit list
                             found by library search in Reference 92 (lower part).



















                             Figure 1.5  Mass chromatograms corresponding to fragment ions typical for
                             sedative–hypnotics generated from the same data file as used for Figure 1.1.


                             middle part), and the structure and the hit list found by library search in
                             Reference 92 (lower part). The appearance of peaks of biomolecules illustrate
                             that the mass chromatograms are only the screening process, and only the
                             comparison of the full spectra leads to a confirmed result. In order to widen
                             the screening window, comprehensive urine screening by full-scan GC/MS



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