Assertion: fingermark | /r/HasProperty | contaminated with 100 μl of 100 ng/ml cocaine
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text: Figure 7 (A) MALDI MS/MS confirmation of 10 ng/mL cocaine spotted onto a polymer banknote, (B) MALDI MS/MS confirmation of 100 ng/mL cocaine spotted onto a latent ungroomed fingermark deposited onto a polymer banknote, (C) MALDI MS images of an unidentified species and protonated stearic acid (m/z 240.2 and m/z 285.2, respectively) and cocaine (m/z 304.2) of a fingermark contaminated with 100 μL of 100 ng/mL cocaine (10 ng total drug),