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首页> 外文期刊>Electrophoresis: The Official Journal of the International Electrophoresis Society >Simultaneous determination of low-molecular-weight organic acids and chlorinated acid herbicides in environmental water by a portable CE system with contactless conductivity detection.
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Simultaneous determination of low-molecular-weight organic acids and chlorinated acid herbicides in environmental water by a portable CE system with contactless conductivity detection.

机译：通过具有非接触式电导检测功能的便携式CE系统，同时测定环境水中的低分子量有机酸和氯化酸除草剂。

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摘要

This report describes a method to simultaneously determine 11 low-molecular-weight (LMW) organic acids and 16 chlorinated acid herbicides within a single run by a portable CE system with contactless conductivity detection (CCD) in a poly(vinyl alcohol) (PVA)-coated capillary. Under the optimized condition, the LODs of CE-CCD ranged from 0.056 to 0.270 ppm, which were better than for indirect UV (IUV) detection of the 11 LMW organic acids or UV detection of the 16 chlorinated acid herbicides. Combined with an on-line field-amplified sample stacking (FASS) procedure, sensitivity enhancement of 632- to 1078-fold was achieved, with satisfactory reproducibility (RSDs of migration times less than 2.2%, and RSDs of peak areas less than 5.1%). The FASS-CE-CCD method was successfully applied to determine the two groups of acidic pollutants in two kinds of environmental water samples. The portable CE-CCD system shows advantages such as simplicity, cost effectiveness, and miniaturization. Therefore, the method presented in this report has great potential for onsite analysis of various pollutants at the trace level.
机译：本报告介绍了一种通过便携式CE系统在聚乙烯醇（PVA）中进行非接触式电导检测（CCD）的同时测定11种低分子量（LMW）有机酸和16种氯化酸除草剂的方法涂层的毛细管。在优化的条件下，CE-CCD的LOD范围为0.056至0.270 ppm，优于11种LMW有机酸的间接UV（IUV）检测或16种氯化酸除草剂的UV检测。结合在线现场放大样品堆叠（FASS）程序，灵敏度提高了632至1078倍，重现性令人满意（迁移时间的RSD小于2.2％，峰面积的RSD小于5.1％ ）。 FASS-CE-CCD方法已成功用于测定两种环境水样中的两组酸性污染物。便携式CE-CCD系统显示出诸如简单，成本效益和小型化的优点。因此，本报告中介绍的方法在痕量水平上对各种污染物的现场分析具有很大的潜力。

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