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目的制备满足流式分析要求的聚苯乙烯微球,进行量子点荧光编码,建立克百威流式快速检测方法,并对荧光编码微球性能进行表征。方法采用无皂乳液聚合法和分散聚合法制备聚苯乙烯微球,通过溶剂挥发法对其进行量子点荧光编码,借助扫描电镜、能谱分析和红外分析对微球进行考察,利用流式细胞仪检测并记录微球的平均荧光强度。结果在0.2~1.0 mg·L-1克百威水溶液中,随着克百威质量浓度的增加,量子点荧光编码聚苯乙烯(polystyrene labeled with quantum dots,QDs@PS)微球的荧光值逐渐下降。结论基于荧光淬灭原理,初步建立了一种水体中克百威残留量的快速、高通量检测方法。
OBJECTIVE To prepare polystyrene microspheres which meet the requirements of flow analysis and carry out quantum dot fluorescence coding to establish a rapid detection method of carbofuran and characterize the performance of the fluorescent coded microspheres. Methods Polystyrene microspheres were prepared by soap-free emulsion polymerization and dispersion polymerization. The microspheres were characterized by scanning electron microscopy, energy dispersive spectroscopy and infrared spectroscopy. The instrument detects and records the average fluorescence intensity of the microspheres. Results Fluorescent values of QDs (PSs) microspheres were gradually increased with the increase of the concentration of carbofuran in 0.2 ~ 1.0 mg · L -1 carbofuran solution. decline. Conclusion Based on the principle of fluorescence quenching, a rapid and high-throughput method for the determination of carbofuran residue in water was established.