氨基甲酸酯类农药荧光分析研究

Study on Fluorescence Analysis for Carbamate Pesticides

分析了西维因、克百威、残杀威等几种常用的氨基甲酸酯类农药的分子结构并揭示了它们的荧光特性,利用稳态荧光光谱仪对西维因和克百威标准溶液进行了荧光光谱实验,结果表明,氨基甲酸酯类农药在一定的溶剂条件下能够受激发产生荧光,而且荧光光谱清晰、分辨率高,受干扰较小,利用荧光光谱分析法对它们进行检测是可行的。

In the present paper the basic theory that an organic substance can emit fluorescence as it is excited by ultraviolet rays is described and the relationships between the molecular structures of organic substances and fluorescence generation are studied. According to this theory, the molecular structures of a few common carbamate pesticides such as carbaryl, carbofuran and propoxur etc. are analyzed, their fluorescence characteristics are shown, and the mechanism of fluorescence generation of carbamate pesticides is ascertained. It provides a theoretic basis for further detecting carbamate pesticides by means of a fluorescence analytical method. Moreover a steady-state fluorescence spectrograph is applied to conduct fluorescence spectrum experiments with standard carbaryl solution and carbofuran solution. The results indicate that carbamate pesticides may emit fluorescence as excited by UV under the condition of a certain solvent, and that their fluorescence spectra are distinct and have fine resolution and less interference. It is feasible to detect carbamate pesticides by fluorescence spectral analysis.