1. Cathinone preservation in khat evidence via drying
John S. Chappell, Marsha M. Lee 
Forensic Science International 
Volume 195, Issue 1, Pages (February 2010)
DOI: /j.forsciint
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2. Fig. 1 The molecular structures illustrated for the khatamines.
Forensic Science International  , DOI: ( /j.forsciint )
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3. Fig. 2
The liquid chromatograms illustrated for an extract of khat A1. The UV absorbance at 200nm (top) and 250nm (bottom) are displayed.
Forensic Science International  , DOI: ( /j.forsciint )
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4. Fig. 3
The khatamine concentrations for khat A1 are plotted as a function of the elapsed time from the start of the study. The solid line represents the least-squares linear regression for the data points (−). The parenthetical notation cites the slope of the linear regression followed by the correlation coefficient (r).
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5. Fig. 4
The total ion chromatogram presented by an extract of khat A1 (prepared 1164 days into study). An expanded view of the chromatogram illustrates the relevant peaks.
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6. Fig. 5
The mass spectrum collected from the cathinone peak of the total ion chromatogram (Fig. 4) of an extract of khat A1. The mass spectrum of a cathinone standard is shown for comparison.
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7. Fig. 6
The mass spectrum collected from the cathine peak of the total ion chromatogram (Fig. 4) of an extract of khat A1. The mass spectrum of a cathine standard is shown for comparison.
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8. Fig. 7
The total (infrared) response chromatogram presented for the same extract of khat A1 depicted in Fig. 4. An expanded view of the chromatogram illustrates the relevant peaks.
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9. Fig. 8
The vapor-phase infrared transmission spectrum collected from the cathinone peak of the total response chromatogram (Fig. 7) of an extract of khat A1. The vapor-phase spectrum of a cathinone standard is shown for comparison. Spectra collected at 280°C and at 8cm−1 resolution.
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10. Fig. 9
The vapor-phase infrared transmission spectrum collected from the cathine peak of the total response chromatogram (Fig. 7) of an extract of khat A1. The vapor-phase spectrum of a cathine standard is shown for comparison. Spectra collected at 280°C and at 8cm−1 resolution.
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11. Fig. 10
The khatamine concentrations for khat B are plotted as a function of the elapsed time after drying in a fume hood (approximately 20°C) for 72h. The solid line represents the least-squares linear regression for the data points (−). The parenthetical notation cites the slope of the linear regression followed by the correlation coefficient (r).
Forensic Science International  , DOI: ( /j.forsciint )
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