You Jing, Koropchak John A
Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale, IL 62901-4409, USA.
J Chromatogr A. 2003 Mar 14;989(2):231-8. doi: 10.1016/s0021-9673(03)00084-0.
An ion chromatography-condensation nucleation light scattering detection (IC-CNLSD) method was successfully used to directly analyze glyphosate, a polar pesticide, and aminomethylphosaphonic acid, the major metabolite of glyphosate, in water without need of pre-treatment or derivatization. CNLSD gave a LOD of 53 ng/ml for glyphosate, which is much lower than the maximum contaminant level of 700 ng/ml for drinking water issued by the US Environmental Protection Agency. Spiked analytes in different matrixes were tested. A diluted commercial herbicide containing glyphosate was also evaluated. Compared to other reported methods, the IC-CNLSD method has no need of sample derivatization, pre-concentration, and mobile phase conductivity suppression. It is simple, fast and inexpensive. IC-CNLSD is an ideal direct detection technique for such pesticides without chromophores or fluorophores.
一种离子色谱-冷凝核光散射检测（IC-CNLSD）方法被成功用于直接分析水中的草甘膦（一种极性农药）及其主要代谢物氨甲基膦酸，无需预处理或衍生化。CNLSD对草甘膦的检测限为53 ng/ml，远低于美国环境保护局规定的饮用水700 ng/ml的最大污染物水平。对不同基质中添加的分析物进行了测试。还评估了一种稀释的含草甘膦商业除草剂。与其他报道的方法相比，IC-CNLSD方法无需样品衍生化、预浓缩和流动相电导率抑制。它简单、快速且成本低廉。IC-CNLSD是一种用于此类无发色团或荧光团农药的理想直接检测技术。
