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The stability of phenethylamines and ketamine substitutes in different matrices and temperatures. The stability of (a) para-methoxyamphetamine (PMA), (b) para-methoxymethamphetamine (PMMA), (c) deschloroketamine (DCK), and (d) 2-fluorodeschloroketamine (2-FDCK) in 50% methanol/water (50% MeOH), 50% methanol/water with 0.1% formic acid (50% MeOH in 0.1% FA), and urine at −20°C, 4°C, and 25°C.
