在线固相萃取-超高效液相色谱/串联质谱法测定水中新烟碱类杀虫剂  

Detection of trace neonicotinoid insecticides in water by on-line solid phase extraction-ultra-high performance liquid chromatography-triple quadrupole tandem mass spectrometry

作　　者：金苗[1] 陶泽榕 赵中华[1] 沈幸 JIN Miao;TAO Zerong;ZHAO Zhonghua;SHEN Xing(State Key Laboratory of Lake Science and Environment Reseaich,Nanjing Institute of Geography and limnology,Chinese Academy of Sciences,Nanjing 210008)

机构地区：[1]湖泊与环境国家重点实验室,中国科学院南京地理与湖泊研究所,南京210008

出　　处：《分析试验室》2021年第1期12-16,共5页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金(41671477);科技基础性工作专项(2015FY110900-03)项目资助。

摘　　要：采用在线固相萃取-超高效液相色谱/串联质谱技术建立了水中啶虫脒、噻虫胺、吡虫啉、噻虫啉、噻虫嗪、呋虫胺及烯啶虫胺7种新烟碱类杀虫剂的检测方法。样品滤膜过滤后,经HLB Dierect Connect HP在线固相萃取小柱富集纯化,以ACQUITY UPLC BEH C_(18)为分析柱串联质谱进行检测,外标法定量。在线富集水样中新烟碱类物质在5.0~200 ng/L范围内线性关系良好,相关系数R^(2)均大于0.99;检出限为0.30~2.92 ng/L,相对标准偏差均小于10%。该法可用于保障水环境安全、及时提供污染信息。Seven kinds of Neonicotinoid insecticides,dinotefuran,acetamiprid,clothianidin,thiacloprid,imidacloprid,nitenpyram and thiamethoxam in groundwater were determined by on-line solid phase extraction-ultra-high performance liquid chromatography/tandem mass spectrometry.After filtration by filter membrane,HLB cartridge was selected to enrich and purify water samples.The analytes were separated on ACQUITY UPLC BEH C_(18) column and quantified by tandem mass spectrometry.The linear correlation coefficients of neonicotinoid insecticides were higher than 0.99 in the concentration range of 5.0-200 ng/L;the limits of detection were 0.30-2.92 ng/L;the relative standard deviations(RSDs)were less than 10%.The proposed method can meet the ultra-trace analysis requirements of the neonicotinoid insecticides in the waters samples.

关 键 词：新烟碱类杀虫剂 在线固相萃取 超高效液相色谱/串联质谱 

分 类 号：O657.63[理学—分析化学]