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基于链霉素使Cd Te量子点荧光增强的特性,建立了以Cd Te量子点为荧光探针检测黄瓜中链霉素残留量的新方法。研究了影响链霉素检测的因素,确定了最佳测定条件。在最佳实验条件下,链霉素的浓度在5.0×10-12~1.0×10-10mol/L范围与体系的相对荧光强度呈线性关系,线性相关系数(r)为0.999 0,检出限达5.0×10-13mol/L,方法的加标回收率为99%~106%。方法具有选择性高、检出限低、简单快速等优点,用于黄瓜中链霉素残留量的测定,结果令人满意。
Based on the enhancement of the fluorescence of CdTe quantum dots by streptomycin, a new method for detecting streptomycin residues in cucumber by using CdTe quantum dots as fluorescent probes was established. The factors affecting the detection of streptomycin were studied, and the best determination conditions were determined. Under the optimum experimental conditions, the relative fluorescence intensity of streptomycin in the range of 5.0 × 10-12 ~ 1.0 × 10-10 mol / L was linear with the linear correlation coefficient (r) was 0.999 0. The detection limit Up to 5.0 × 10-13mol / L, the method of spiked recoveries of 99% to 106%. The method has the advantages of high selectivity, low detection limit, simple and quick, and is used for the determination of streptomycin residues in cucumber with satisfactory results.