Coly A, Aaron J J
Institut de Topologie et de Dynamique des Systèmes de l'Université Denis-Diderot-Paris 7, Laboratoire Associé au CNRS, 1, rue Guy de la Brosse, 75005 Paris, France.
Talanta. 1999 Jun;49(1):107-17. doi: 10.1016/s0039-9140(98)00349-x.
An analytical method based on the use of UV irradiation to produce fluorescent derivatives from four non-fluorescent sulfonylurea herbicides, including chlorsulfuron, metsulfuron methyl, 3-rimsulfuron and sulfometuron methyl is described. Their photochemically-induced fluorescence (PIF) properties in several solvents (water, dimethyl sulfoxide (DMSO), dimethyl formamide (DMF), acetonitrile, methanol, ethanol, propan-2-ol and their binary mixtures with water) and micellar solutions of sodium dodecyl sulfate (SDS), and cetyltrimethylammonium chloride (CTAC) are reported. Physicochemical variable influencing the sensitivity of the method have been optimized. A PIF method is developed for the determination of the four herbicides under study. Micellar media are found to provide the best analytical figures of merits. Linear dynamic ranges are established over about two orders of magnitude. The limit of detection (LOD) range from 0.2 to 6 ng ml(-1) according to the compound, with relative standard deviation (RSD) between 1.2 and 3.9%. Examples of applications to the analysis of these herbicides in spiked river water samples are given. The mean recoveries range from 80 to 104%.
描述了一种基于紫外线照射的分析方法，该方法可从四种非荧光磺酰脲类除草剂（包括氯磺隆、甲磺隆、醚苯磺隆和甲基苯磺隆）生成荧光衍生物。报告了它们在几种溶剂（水、二甲基亚砜（DMSO）、二甲基甲酰胺（DMF）、乙腈、甲醇、乙醇、丙-2-醇及其与水的二元混合物）以及十二烷基硫酸钠（SDS）和十六烷基三甲基氯化铵（CTAC）的胶束溶液中的光化学诱导荧光（PIF）特性。对影响该方法灵敏度的物理化学变量进行了优化。开发了一种PIF方法用于测定所研究的四种除草剂。发现胶束介质具有最佳的分析性能指标。线性动态范围在大约两个数量级内建立。根据化合物不同，检测限（LOD）范围为0.2至6 ng ml⁻¹，相对标准偏差（RSD）在1.2%至3.9%之间。给出了在加标河水样品中分析这些除草剂的应用实例。平均回收率范围为80%至104%。
Zotero 插件