敌草快中三联吡啶的气质联用定量分析研究

Study on quantitative analysis of 2,2′:6,2″-terpyridine in Diquat by GC-MS

用气相色谱-质谱联用技术中的选择离子质谱法对敌草快中有害杂质2，2＇：6，2＂-三联吡啶的定量分析进行了研究。试验选用HP-5H5毛细管色谱柱，电离方式为ESI。结果表明：该方法对2，2＇：6，2＂-三联吡啶的最低检测限为0．005mg·kg^-1，线性范围为0．05～2．0mg·kg^-1，方法的标准偏差0．0172，变异系数为0．253％，平均回收率为98．97％。

The deleterious impurity 2,2＇：6,2＂-terpyridine in Diquat was quantified by gas chromatography-mass spectrometry （GC-MS）. HP-5H5 chromatography column was used, along with electrospray ionization （ESI）. The results showed as follow： the limit detection （LOD） was 0.005 mg·kg^-1, the linear plots were between 0.05-2.0 mg·kg^-1, the relative standard deviation was 0.017 2, the coefficient of variation was 0.253% and the average recovery was 98.97%.