Abstract: It is crucial to determine the origins of illicit drugs in the fight against drug crimes. In China the most consumed illegal drug is heroin, hence the identification of its origins is of major interest. Three approaches currently used abroad to trace the origins are introduced, i.e. the impurities profiling, trace-elemental fingerprinting, and stable isotope ratio technique. The last has ability to distinguish different geographic provenance of opium crops, therefore it has prominent advantage in origin analysis. Gas chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS) has been proved to be one of the best methods in the isotope ratio measurement at present. It can also be applied to the identification of sources of other kinds of trace evidence, such as explosives, medicine and oil. This technique possesses great potential in the field of forensic science.

Key words: origins of illicit drugs, heroin, gas chromatography-combustion-iso-tope ratio mass spectrometry

摘要： 毒品来源的鉴定是指对毒品样品中包含的来源信息进行提取并分析,这有助于打击毒品犯罪。海洛因是危害我国的主要毒品,它的来源鉴定更引起人们的关注。本文介绍了国际上研究海洛因来源的三种方法,即研究海洛因样品中的各种有机杂质及其相对比例;研究海洛因样品中的痕量无机元素;研究海洛因及吗啡的稳定同位素相对比值。第三种方法能够反映样品的地域性特点,因而在来源鉴定方面有突出的优势。气相色谱-燃烧-同位素比值质谱法是同位素比值测定方法中用于海洛因来源鉴定的最佳手段。这一技术还可用于其他微量物证(如炸药、药品、油品等)的来源鉴别,因而在法庭科学领域内显示了广阔的应用前景。

关键词: 毒品来源, 海洛因, 气相色谱同位素比值质谱法