Rial-Otero Raquel, Cancho-Grande Beatriz, Perez-Lamela Concepcion, Simal-Gándara Jesús, Arias-Estévez Manuel
Nutrition and Bromatology Group, Analytical and Food Chemistry Department, University of Vigo, Ourense Campus, E-32004 - Ourense, Spain.
J Chromatogr Sci. 2006 Oct;44(9):539-42. doi: 10.1093/chromsci/44.9.539.
A method based on solid-phase extraction (on silica cartridges) and high-performance liquid chromatography (HPLC) followed by diode array UV detection is presented as an analytical tool for screening diquat (DQ) and paraquat (PQ) in drinking waters. The method is useful for quality control laboratories of water companies and beverage industries. Absolute recoveries of DQ and PQ from drinking water (25 mL in all cases), spiked at levels between 0.1, 1.0, and 5.0 microg/L, range from 91% to 103%. Relative standard deviation percentages are between 3% and 11%. Quantitation and detection limits are 70 and 40 ng/L for DQ and 90 and 60 ng/L for PQ, respectively; therefore, these herbicides can be detected and quantitated at levels below the limits established by the European Union.
提出了一种基于固相萃取（硅胶柱）和高效液相色谱（HPLC）并结合二极管阵列紫外检测的方法，作为饮用水中敌草快（DQ）和百草枯（PQ）的筛选分析工具。该方法对自来水公司和饮料行业的质量控制实验室很有用。从添加了0.1、1.0和5.0μg/L不同水平敌草快和百草枯的饮用水（所有情况下均为25mL）中的绝对回收率在91%至103%之间。相对标准偏差百分比在3%至11%之间。敌草快的定量限和检测限分别为70和40ng/L，百草枯的定量限和检测限分别为90和60ng/L；因此，这些除草剂可以在低于欧盟规定限值的水平下进行检测和定量。
