Liao W, Joe T, Cusick W G
California Department of Food and Agriculture, Division of Inspection Services, Anaheim 92801.
J Assoc Off Anal Chem. 1991 May-Jun;74(3):554-65.
A gas chromatographic/mass spectrometric (GC/MS) screening method has been developed for the determination of pesticide residues in a variety of crop samples. Samples are extracted with acetonitrile and partitioned with sodium chloride saturated aqueous solution. Targeted pesticide analytes are separated on a short, narrow bore capillary column, identified by electron ionization MS scanned from 100 to 400 amu, and quantitated by the monitoring of base ions and internal standards. The accuracy of the quantitative determination measured in terms of average percentage recovery of 143 compounds in 13 crop samples was 92% with a relative standard deviation of 22%.
已开发出一种气相色谱/质谱（GC/MS）筛查方法，用于测定各种农作物样品中的农药残留。样品用乙腈萃取，并用氯化钠饱和水溶液进行分配。目标农药分析物在短而窄内径的毛细管柱上分离，通过在100至400原子质量单位范围内扫描的电子电离质谱进行鉴定，并通过监测基峰离子和内标进行定量。以13种农作物样品中143种化合物的平均回收率百分比衡量，定量测定的准确度为92%，相对标准偏差为22%。
