气相色谱-质谱法同时测定蔗汁中的莠去津与莠灭净残留量

JOURNAL OF INSTRUMENTAL ANALYSIS(2011)

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Abstract
建立了气相色谱-质谱法(GC-MS/SIM)同时测定蔗汁样品中莠去津和莠灭净的方法,并优化了样品前处理和色谱条件.在优化条件下,两种除草剂在0.00-0.60 mg/L范围内线性关系良好,方法的检出限(S/N=3)均为0.001 mg/L.在加标水平为0.050-0.100 mg/L时,两种除草剂的回收率在93%-106%之间,相对标准偏差(RSD,n=6)为4.4%-10.7%.该方法步骤简单,净化效果好,具有良好的灵敏度、回收率和重复性.
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