Li Zhi, Zhang Shuaihua, Yin Xiaofang, Wang Chun, Wang Zhi
Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding, Hebei 071001, China.
Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding, Hebei 071001, China
J Chromatogr Sci. 2014 Sep;52(8):926-31. doi: 10.1093/chromsci/bmt124. Epub 2013 Aug 26.
Dispersive liquid-liquid microextraction combined with online sweeping preconcentration in micellar electrokinetic chromatography was developed for the simultaneous determination of five triazine herbicides (atrazine, simazine, propazine, prometon and simetryn) in water samples. Several experimental parameters affecting the extraction efficiencies such as the type and volume of both the extraction and dispersive solvents, the addition of salt to sample solution, the extraction time and the pH of the sample solution were investigated. Under optimum conditions, the linearity of the method was good in the range from 0.33 to 20 ng mL(-1) for simazine, propazine, atrazine and simetryn, and from 0.17 to 20 ng mL(-1) for prometon, respectively. The sensitivity enrichment factors were in the range from 1750 to 2100, depending on the compound. The limit of detection (S/N = 3) ranged from 0.05 to 0.10 ng mL(-1). The developed method was successfully applied to the analysis of the five triazines in river, ground and well waters.
建立了分散液液微萃取结合胶束电动色谱在线扫集富集方法，用于同时测定水样中的5种三嗪类除草剂（阿特拉津、西玛津、扑灭通、扑灭津和西草净）。考察了萃取溶剂和分散溶剂的种类与体积、向样品溶液中加盐、萃取时间以及样品溶液pH值等影响萃取效率的实验参数。在最佳条件下，该方法对西玛津、扑灭通、阿特拉津和西草净的线性范围为0.33～20 ng mL⁻¹，对扑灭津的线性范围为0.17～20 ng mL⁻¹。根据化合物不同，灵敏度富集因子在1750～2100范围内。检测限（S/N = 3）为0.05～0.10 ng mL⁻¹。所建立的方法成功应用于河水、地下水和井水样品中5种三嗪类除草剂的分析。
