Ferris I G, Haigh B M
J Chromatogr Sci. 1987 Apr;25(4):170-3. doi: 10.1093/chromsci/25.4.170.
An automated procedure is described for the rapid determination of the residual herbicide atrazine at ppb levels in soil-water extracts. The system consists of an autosampler connected to a C18 precolumn linked via a switching valve to a C18 analytical column and spectrophotometer. Peak height is superior to peak area for quantifying results with coefficients of variation of 0.48% and 0.89%, respectively, for 7.5 ng standard injections. Precolumn concentration eliminates the need for sample cleanup and achieves up to a 37% increase in peak height compared to an isocratic system. In a black earth soil, atrazine is identified as the principal phytotoxic constituent. The minimum detectable level is one-tenth the critical no-effect threshold for wheat. The method is well suited for predicting possible atrazine injury to susceptible crops and the measurement of other nonpolar analytes in aqueous solution.
描述了一种自动化程序，用于快速测定土壤水提取物中痕量水平的残留除草剂阿特拉津。该系统由一个自动进样器组成，它连接到一个C18预柱，通过一个切换阀与一个C18分析柱和分光光度计相连。对于定量结果，峰高优于峰面积，7.5 ng标准进样的变异系数分别为0.48%和0.89%。预柱浓缩无需样品净化，与等度系统相比，峰高最多可提高37%。在黑土中，阿特拉津被确定为主要的植物毒性成分。最低检测水平是小麦临界无效应阈值的十分之一。该方法非常适合预测阿特拉津对敏感作物可能造成的损害以及测定水溶液中的其他非极性分析物。
