1. Real time quantitative colourimetric test for methamphetamine detection using digital and mobile phone technology 
Aree Choodum, Kaewalee Parabun, Nantikan Klawach, Niamh Nic Daeid, Proespichaya Kanatharana, Worawit Wongniramaikul 
Forensic Science International 
Volume 235, Pages 8-13 (February 2014)
DOI: /j.forsciint
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2. Fig. 1
Real time on-mobile color analysis system for methamphetamine detection.
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3. Fig. 2
Spectrophotometric detection (580nm) of Simon-Awe product from methamphetamine.
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4. Fig. 3
Relationship between intensity of each color and methamphetamine concentration (all were point-to-point lines, except linear portions which were regression lines).
Forensic Science International  , 8-13DOI: ( /j.forsciint )
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5. Fig. 4
Relationship between absorbance of each color and methamphetamine concentration.
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6. Fig. 5
Relationship between (a) total intensity (b) absorbance and methamphetamine concentration.
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7. Fig. 6
Relationship between blank subtracted RGB values and methamphetamine concentration (a) each individual intensity (b) absorbance (c) total intensity (d) total absorbance.
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8. Fig. 7 Chromatogram of Yaba tablet (sample 3).
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