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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.

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Presentation on theme: "Effective injection in pulsed splitless mode for impurity profiling of methamphetamine crystal by GC or GC/MS  Tetsuro Sasaki, Yukiko Makino  Forensic."— Presentation transcript:

1 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: /j.forsciint Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

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

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

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

5 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  , 1-10DOI: ( /j.forsciint ) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

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

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

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

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

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

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

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

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