超高效液相色谱-串联质谱法测定甘蓝和土壤中的醚菊酯残留  

Determination of ethofenprox residue in cabbage and soil by UPLC-MS

作　　者：纪然[1] 朱光艳[2] 刘冰[1] 

机构地区：[1]中国石油化工股份有限公司北京化工研究院环境保护研究所,北京100013 [2]农业部农药检定所,北京100125

出　　处：《农药学学报》2010年第3期283-288,共6页Chinese Journal of Pesticide Science

摘　　要：建立了测定甘蓝和土壤中醚菊酯残留量的超高效液相色谱-串联质谱联用分析方法。在0.02,0.20和2.00mg/kg3个添加水平范围内,平均回收率为80.3%～105.5%,相对标准偏差<6.9%,样本中醚菊酯的最低检测浓度为0.02mg/kg。该方法简便易行、干扰少、分离效果好、准确度和灵敏度较高。采用所建立方法测定了北京、浙江杭州和云南昆明3地甘蓝和土壤中醚菊酯的残留消解动态及最终残留量。结果表明,醚菊酯在甘蓝和土壤中的消解半衰期分别为1.9～2.1和14～16d;10%醚菊酯水乳剂于甘蓝生长旺期施药3～4次(间隔7d),有效施药剂量为60和90g/hm2,收获期距末次施药间隔7,14,21d时,甘蓝和土壤中醚菊酯的最终残留量均低于0.02mg/kg。A UPLC-MS method for determination of ethofenprox residue in cabbage and soil has been established.The mean recoveries of the method varied from 80.3% to 105.5% and the relative standard deviation (RSD) was less than 6.9%,at three spiked levels(0.02,0.20 and 2.00 mg/kg).The limit of quantification of ethofenprox in cabbage and soil was 0.02 mg/kg.The method was characterized by simplicity,higher sensitivity and accuracy.This method was applied to study the residue and decline dynamics of ethofenprox in Beij...

关 键 词：液-质联用 甘蓝 土壤 醚菊酯 残留分析 

分 类 号：X833[环境科学与工程—环境工程]