中文摘要：

利用吗啉胍使CdTe量子点荧光增强的特性,建立了西红柿中吗啉胍残留量的检测新方法。研究了影响量子点荧光探针行为的因素,确定最佳工作条件：量子点浓度为1×10-4 mol/L,pH=5.6,反应温度为20℃,反应时间为20 min。在最佳测定条件下,CdTe 量子点荧光探针对吗啉胍响应的线性范围为1.0×10-12~5.0×10-10 mol/L,检出限为5.2×10-13 mol/L,线性相关系数R=0.9981,方法的回收率97%~106%,常见共存离子、抗生素、维生素等共存物质对吗啉胍的测定不产生干扰。本方法用于西红柿中吗啉胍残留量的测定,结果令人满意。

英文摘要：

A novel method for the detection of moroxydine （ ABOB） residue in tomatoes was developed based on the enhancement of the fluorescence intensity of CdTe quantum dots（ QDs） in the presence of ABOB. The factors influencing the performance of the QDs fluorescent probes were investigated, and the optimum conditions were determined：the concentration of mercaptoacidic acid （ TGA） capped-CdTe quantum dot was 1×10-4 mol/L, and the reaction time was 20 min at pH=5. 6. Under the optimum conditions, the relative fluorescence intensity increases linearly proportional to the ABOB concentration in the range of 1. 0×10-12-5. 0×10-10 mol/L with a limit of detection of 5. 2×10-13 mol/L, R=0. 9981, the recovery was 97%-106%, without obvious interference on the determinations of moroxydine from the common coexisting ions, antibiotics, and vitamins. The proposed method has been successfully applied in the detection of trace moroxydine hydrochloride residue in tomatoes.