Irace-Guigand Sandrine, Leverend Emilie, Seye Mame Diabou Gaye, Aaron Jean Jacques
ITODYS, University Denis Diderot, CNRS (UMR 70-86), 1 Rue Guy de la Brosse, 75005 Paris, France.
Luminescence. 2005 May-Jun;20(3):138-42. doi: 10.1002/bio.817.
A new flow injection analysis micellar-enhanced photochemically induced fluorescence (FIA-MEPIF) method was developed for the determination of four phenylurea herbicides, including isoproturon, neburon, linuron and diuron. On-line photoconversion under UV irradiation of these herbicides into strongly fluorescent photoproducts was performed in buffered aqueous solutions and in the presence of surfactants [sodium dodecyl sulphate (SDS) or cetyl trimethyl ammonium chloride (CTAC)] at micellar concentrations. The MEPIF and FIA parameters were optimized. The analytical figures of merit for the determination of the four herbicides were satisfactory, with concentration linear dynamic ranges over about one to two orders of magnitude, detection limits of 0.33-0.92 mg[sol ]L and relative standard deviations of 1.3-11%, according to the compound. Application to the analysis of fortified tap water samples yielded good recovery values (91-103%, according to the herbicide). Our results show that the on-line MEPIF-FIA method is simple, versatile, sensitive and can be easily applied to quantify pollutant residues in multiresidue systems.
建立了一种新的流动注射分析胶束增强光化学诱导荧光法（FIA-MEPIF），用于测定四种苯基脲类除草剂，包括异丙隆、草不隆、利谷隆和敌草隆。在缓冲水溶液中，在胶束浓度的表面活性剂[十二烷基硫酸钠（SDS）或十六烷基三甲基氯化铵（CTAC）]存在下，这些除草剂在紫外光照射下在线光转化为强荧光光产物。对MEPIF和FIA参数进行了优化。测定这四种除草剂的分析性能令人满意，浓度线性动态范围约为一到两个数量级，检测限为0.33-0.92mg/L，相对标准偏差为1.3-11%，具体取决于化合物。应用于加标自来水样品的分析，回收率良好（根据除草剂不同，回收率为91-103%）。我们的结果表明，在线MEPIF-FIA方法简单、通用、灵敏，可轻松应用于多残留系统中污染物残留的定量分析。
