利用共存杂质分析甲基苯丙胺的合成信息

通过测定甲基苯丙胺样品中共存杂质的种类与含量，推测其合成途径及来源。将含MA样品用无水乙醇溶解，气相色谱-质谱法分析其组分，归-法计算相对百分含量。结果7个样品的甲基苯丙胺含量在9．81％-97．3％之间，其中3个样品含麻黄碱，含量在4．15％-5．52％；2个样品的共有成分为l-苯基-2-丙酮，含量分别为0．506％，0．696％；剩余2个样品既不含麻黄碱，也不含1-苯基-2-丙酮，甲基苯丙胺含量仅为23．5％和9．81％。推测7个样品中3批样品来源于麻黄碱合成途径，2批样品是苯丙酮合成途径，另2批样品由少量甲基苯丙胺混合其他成分配制而成。目前，麻黄碱仍是合成甲基苯丙胺的主要来源。

Determination of the Synthetic Information Based on Impurity Profiling of Methamphetamine

Impurity profiling of seized methamphetamine （MA） may play an important role in the determination of the synthetic method employed. MA sample was dissolved with ethanol and analyzed by gas chromatography -mass spectrometry（ GC -MS）. The relative contents of components were calculated through normalization. The contents of MA in seven samples were between 9.81% and 97.3%, 3 samples of which the contents of ephedrine were 4.15% - 5.52% ; 2 samples of which the contents of phenyl -2 - propanone were in the range of 0.506% -0. 696% ; the other two samples contained neither ephedrine nor ethylphenylketone, the contents of MA were 23.5% and 9.81%, respectively. The MA were synthesized from ephedrine in three samples and from phenyl - 2 - propanone in two samples, the other samples were made up of MA and other components. At present, ephedrine is still the common material used to synthesize MA.