“…Many papers have been published on the profiling of amphetamine [3,4,5,6,7,8,9], methamphetamine [10,11,12,13,14,15], cocaine [16,17,18] and heroin [19,20,21,22]. For MDMA, some workers have reported impurities or by-products [23,24,25,26,27,28,29,30,31], and techniques like Raman spectroscopy [32] or isotope ratio mass spectrometry [33] have been used to link seized tablets.…”