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首页> 外文期刊>Journal of Fluorescence >Inclusion Complex of O-phthalaldehyde-Buprofezin with Dimethyl-beta-Cyclodextrin Using Thermochemically-Induced Fluorescence Derivatization (TIFD) Method and its Analytical Application in Waters
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Inclusion Complex of O-phthalaldehyde-Buprofezin with Dimethyl-beta-Cyclodextrin Using Thermochemically-Induced Fluorescence Derivatization (TIFD) Method and its Analytical Application in Waters

机译：使用热化学诱导的荧光衍生化（TIFD）法及其在水中的分析应用，用二甲基β-环糊精包合物包合物。用热化学诱导的荧光衍生化及其分析应用

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摘要

Improvement of the TIFD method to determine buprofezin (BUP) founded on the O-phthalaldehyde (OPA)-thermoproduct complex of buprofezin (OPA-BUP) with dimethyl-beta-cyclodextrin (DM beta CD) was investigated at 25 degrees C. The TIFD method developed in DM beta CD medium, was optimized with respect to the reaction time, DM beta CD concentration and pH. Based on the inclusion reaction, the OPA-BUP: DM beta CD inclusion complex was developed in two aqueous media pH7 and pH13. A 1:1 stoichiometric ratio of OPA-BUP: DM beta CD complex was obtained. The binding constants (K) and Gibbs energy (Delta G degrees) values increasing and decreasing with pH, respectively, show the spontaneous and thermodynamically favorable at 25 degrees C of the inclusion complexes formation. Normalized TIFD spectra were measured at 425nm for emission and at 345nm for excitation. Limits of detection (LOD) and quantification (LOQ) obtained, according to the pH, were in the ranges 0.05-0.1ng mL (- 1) and 0.2-0.4ng mL (- 1), respectively. Relative standard deviation (RSD) values, less than 1.3% corroborated TIFD method repeatability in DM beta CD medium. Solid phase extraction (SPE) procedure which was used for quantitative analysis of natural water samples collected from Niayes area, led to satisfactory recovery rates values 99.5-117.3%.
机译：在25摄氏度下研究了在邻苯甲酸丁蛋白（OPA-BUP）的O-酞甲蛋白（OPA-BUP）的O-酞甲醛（OPA） - 热调节络合物上求解Buprofezin（Bup）的改进。在DMβCD培养基中开发的方法，相对于反应时间，DMβCD浓度和pH优化。基于夹杂物反应，在两个含水介质pH7和pH13中开发了OPA-BUP：DMβCD包合物。获得OPA-BUP：DMβCD复合物的1：1化学计量比。结合常数（K）和Gibbs能量（Delta G度）分别增加和用pH降低，显示出在夹杂物复合物形成的25℃下的自发性和热力学良好。标准化的TIFD光谱在425nm下测量排放和345nm以激发。根据pH值，得到的检测限（LOD）和定量（LOQ）分别在0.05-0.1ngml（ - 1）和0.2-0.4ng ml（ - 1）中。相对标准偏差（RSD）值，在DMβCD培养基中少于1.3％的CONROBORATED TIFD方法重复性。用于定量分析的固相萃取（SPE）方法从北美区域收集的天然水样的定量分析，导致令人满意的恢复率值为99.5-117.3％。

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