Research Article

Simultaneous Determination and Stability Analysis of Ten New Psychoactive Substances including Synthetic Cathinones, Phenethylamines, and Ketamine Substitutes in Urine Using Liquid Chromatography-Tandem Mass Spectrometry

Figure 1

Total ion chromatogram of the analytes. The total ion chromatogram (TIC) of (a) 10 new psychoactive substances and (b) four internal standards in this study. Mephedrone: 4-methylmethcathinone; ephylone: N-ethylpentylone; 4-MEAPP: 4-methyl-α-ethylaminopentiophenone; PMA: para-methoxyamphetamine; PMMA: para-methoxymethamphetamine; DCK: deschloroketamine; 2-FDCK: 2-fluorodeschloroketamine; MDA-D5: 3,4-methylenedioxyamphetamine-D5.
(a)
(b)