Effective injection in pulsed splitless mode for impurity profiling of methamphetamine crystal by GC or GC/MS Tetsuro Sasaki, Yukiko Makino Forensic.

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Effective injection in pulsed splitless mode for impurity profiling of methamphetamine crystal by GC or GC/MS Tetsuro Sasaki, Yukiko Makino Forensic Science International Volume 160, Issue 1, Pages 1-10 (June 2006) DOI: 10.1016/j.forsciint.2005.07.019 Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 1 Synthesis routes for methamphetamine. Forensic Science International 2006 160, 1-10DOI: (10.1016/j.forsciint.2005.07.019) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 2 Comparison of chromatograms by different injection temperatures in NS/L-mode. Forensic Science International 2006 160, 1-10DOI: (10.1016/j.forsciint.2005.07.019) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 3 Behavior of representative peak intensities. Forensic Science International 2006 160, 1-10DOI: (10.1016/j.forsciint.2005.07.019) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 4 (a) Comparison chromatogram of ephedrine-rich sample; (b) comparison chromatogram of aziridine-rich sample; (c) comparison chromatogram of naphthalene-rich sample. BzAld: benzaldehyde; Am+: amphetamine+benzylmethylketone; Ma: methamphetamine; Eph: ephedrine; DmphNaph: dimethylphenylnaphthalene; BzmNaph: benzylmethylnaphthalene. Forensic Science International 2006 160, 1-10DOI: (10.1016/j.forsciint.2005.07.019) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 5 Comparison view of the changing peak intensity patterns. Forensic Science International 2006 160, 1-10DOI: (10.1016/j.forsciint.2005.07.019) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 6 Comparison chromatograms of NS/L vs. PS/L-mode (Am-Be: benzylamphetamine, Ma-Fo: N-formylmethamphetamine, Ma-Ac: acethylmethamphetamine). Forensic Science International 2006 160, 1-10DOI: (10.1016/j.forsciint.2005.07.019) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 7 Changing ratios of peak intensity. Forensic Science International 2006 160, 1-10DOI: (10.1016/j.forsciint.2005.07.019) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Figs. 8 and 9 (8) Synthesized characteristic chromatograms for examining behavior. (9) Behavior of peak area ratio (from 48 chromatograms). Forensic Science International 2006 160, 1-10DOI: (10.1016/j.forsciint.2005.07.019) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 10 (a and b) Mass spectra of unknown peak and (c and d) mass spectra of known peak. Forensic Science International 2006 160, 1-10DOI: (10.1016/j.forsciint.2005.07.019) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 10 (a and b) Mass spectra of unknown peak and (c and d) mass spectra of known peak. Forensic Science International 2006 160, 1-10DOI: (10.1016/j.forsciint.2005.07.019) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 11 Dendrogram of cluster analysis of 48 chromatogram and comparison view. Forensic Science International 2006 160, 1-10DOI: (10.1016/j.forsciint.2005.07.019) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions