【摘要】 建立检测水产品中扑草净残留量的固相萃取-气相色谱质谱联用法。样品用乙腈提取,浓缩后经PSA固相萃取柱净化,由气质联用仪选择离子监测模式下测定。该方法条件下扑草净在2.5μg/L~40μg/L浓度范围内线性良好,对空白样品分别添加2、10、20μg/kg扑草净标准溶液,平均回收率在80%~98%,RSD小于10%,检出限为0.5μg/kg。更多还原

【Abstract】 A method for the determination of prometryn in aquatic products with solid phase extraction-gas chromatography mass sepectrometry(SPE/GC-MS)was established. The prometryn in samples was extracted with acetonitrile,and the supernatant was purified by primary secondary amine(PSA) solid phase column.Then,the analyte was determined in selected ion monitoring of GC-MS. The calibration curves of prometryn showed good linearity in 2.5 μg/L-40 μg/L. The mean recoveries of the prometryn varied from 80 % to 98 %when spiked at 2,10,20 μg/kg,and the relative standard deviations were less than 10 %. The limit of the quantitative was 0.5 μg/kg.更多还原