Abstract
Profile analysis of impurities associated with heroin samples and 13C enrichment of heroin are studied in attempts to trace the origin of heroin samples in drug abuse. High-resolution capillary gas chromatography (GC) and mass spectrometry (MS) allow comparative evaluation of various samples with reference to relative retention times, mass spectra and GC peak area. A program developed on a HP 59970 work-station is described for calculating the relative retention time of each integrated GC peak with reference to added standards ( p, p′-DDT and triacontane) or normally present in samples (meconine); these data are then treated statistically for comparison of samples. When GC is combined with isotope-ratio MS, 13C enrichment can be measured at natural abundance level. Preliminary results show some evidence of variation of 13C enrichment according to the geographical site of production.
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