期刊
JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY
卷 42, 期 1-2, 页码 61-70出版社
SPRINGER
DOI: 10.1023/A:1014523521684
关键词
beta-CD; HP-beta-CD; inclusion complexes; phenylurea herbicides; photochemically-induced fluorescence
The effect of beta-cyclodcxtrin (beta-CD) and hydroxypropyl-beta-cyclodcxtrin (HP-beta-CD) upon the photochemically-induced fluorescence (PIF) properties of four phenylurea herbicides, including linuron, diuron, isoproturon and neburon has been studied, Photochemical conversion of these nonfluorescent herbicides into strongly fluorescent photoproducts was shown to occur in beta-CD and HP-beta-CD aqueous media. The influence of pH, UV irradiation time and photoproduct stability on the fluorescence intensity was also investigated. In addition, the stoichiometry and formation constants of the complexes formed between herbicides and beta-cyclodcxtrin (beta-CD) or 2-hydroxypropyl-beta-cyclodextrin (HP-beta-CD) were determined. The formation constant values, ranging from 184 +/- 40 to 1498 +/- 245 M-1, were calculated by applying the iterative nonlinear regression (NLR) approach to the PIF data. Linear calibrations graphs were established in the interval 1-12 mug/mL, for diuron, linuron and neburon. The IUPAC limits of detection ranged between 580 and 700 ng/mL, according to the compound. Application to the analysis of phenylurea herbicides in spiked river water was also described.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据