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. 2015 Jun 29;5:11716. doi: 10.1038/srep11716

Figure 4. MALDI MS images of ‘high’ (“handling” scenario) and ‘low’ (“abuse” scenario) spiked fingermarks contaminated with amphetamine, cocaine, BZE, EME, heroin, 6-MAM, morphine, MDA, THC and THCA. All images were normalised against the matrix peak at m/z 190.

Figure 4