利用ＤＢ－５弹性石英毛细管柱气相色谱／质谱联用技术分析公安人员缴获非法生产甲基安非他明粗产品，其中含有甲基安非他明８３％，及主要杂质１－苯基丙酮１３．４６％和２－甲亚胺基－１－苯基丙烷１．３３％。此外还检测到了甲基安非他明的分解产物１－丙烯基苯０．１１％。２－丙烯基苯０．０３％和环丙基苯０．０１％等。据此我们可以判断，该甲基安非他明是从１－苯基丙酮和甲胺反应再经催化氢化合成而得。 The use of DB-5 elastic quartz capillary gas chromatography / mass spectrometry analysis of public security officers seized illegal production of methamphetamine crude product, which contains 83% of methamphetamine, and the main impurity 1-phenyl acetone 13 .46% and 2-azomethylen-1-phenylpropane 1.33%. In addition, 0.11% of 1-propenylbenzene was also detected as a decomposition product of methamphetamine. 0.03% of 2-propenylbenzene and 0.01% of cyclopropylbenzene. Based on this, we can conclude that the methamphetamine is derived from the reaction of 1-phenylpropanone and methylamine with catalytic hydrogenation.