Yin Ge, Athanassiadis Ioannis, Bergman Åke, Zhou Yihui, Qiu Yanling, Asplund Lillemor
Department of Environmental Science and Analytical Chemistry, Stockholm University, SE-10691, Stockholm, Sweden.
State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
Environ Sci Pollut Res Int. 2017 May;24(15):13307-13314. doi: 10.1007/s11356-017-8956-y. Epub 2017 Apr 6.
The acaricide, dicofol, is a well-known pesticide and partly a substitute for dichlorodiphenyltrichloroethane (DDT). Only few reports on environmental occurrence and concentrations have been reported calling for improvements. Hence, an analytical method was further developed for dicofol and dichlorobenzophenone (DCBP) to enable assessments of their environmental occurrence. Concentrated sulfuric acid was used to remove lipids and to separate dicofol from DCBP. On-column injection was used as an alternative to splitless injection to protect dicofol from thermal decomposition. By the method presented herein, it is possible to quantify dicofol and DCBP in the same samples. Arctic cod (Gadus morhua) were spiked at two dose levels and the recoveries were determined. The mean recovery for dicofol was 65% at the low dose (1 ng) and 77% at the high dose (10 ng). The mean recovery for DCBP was 99% at the low dose (9.2 ng) and 146% at the high dose (46 ng). The method may be further improved by use of another lipid removal method, e.g., gel permeation chromatography. The method implies a step forward in dicofol environmental assessments.
杀螨剂三氯杀螨醇是一种知名的杀虫剂，部分可替代滴滴涕（DDT）。关于其在环境中的存在情况和浓度的报告较少，因此需要改进。为此，进一步开发了一种用于分析三氯杀螨醇和二氯二苯甲酮（DCBP）的方法，以便能够评估它们在环境中的存在情况。使用浓硫酸去除脂质，并将三氯杀螨醇与二氯二苯甲酮分离。采用柱上进样替代不分流进样，以保护三氯杀螨醇不发生热分解。通过本文提出的方法，可以对同一样品中的三氯杀螨醇和二氯二苯甲酮进行定量分析。在两个剂量水平下对北极鳕鱼（大西洋鳕）进行加标，并测定回收率。三氯杀螨醇在低剂量（1纳克）时的平均回收率为65%，在高剂量（10纳克）时为77%。二氯二苯甲酮在低剂量（9.2纳克）时的平均回收率为99%，在高剂量（46纳克）时为146%。该方法可通过使用另一种脂质去除方法（如凝胶渗透色谱法）进一步改进。该方法在三氯杀螨醇的环境评估方面向前迈进了一步。
