Thioglycolic acid-modified CuInS₂ quantum dots were prepared by a hydrothermal method. A method for the determination of sparfloxacin by a CuInS₂ ternary-quantum dot fluorescence probe was established based on the fact that the fluorescence of CuInS₂ quantum dots can be significantly quenched by sparfloxacin. The optimized experimental conditions are as follows: (1) the concentration of CuInS₂ quantum dots is 0.4 mol·L⁻¹; (2) the pH of the buffer solution is 6, and 1 mL of buffer was used; (3) the reaction time is 5 min. The concentration of sparfloxacin is linearly related to the fluorescence quenching intensity from 0.5 μg/mL to 1 mg/mL, and the maximum detection limit is 1 mg/mL.

通过水热法制备巯基乙酸修饰的CuInS ₂量子点。基于CuInS ₂三元量子点荧光探针可以有效地淬灭CuInS ₂量子点的荧光这一事实，建立了一种用CuInS ₂三元量子点荧光探针测定司帕沙星的方法。优化的实验条件如下：（1）CuInS ₂量子点的浓度为0.4mol·L ^{- 1}；（2）缓冲溶液的pH为6，使用1mL缓冲液。（3）反应时间为5分钟。司帕沙星的浓度与荧光猝灭强度从0.5μg/ mL到1 mg / mL呈线性关系，最大检出限为1 mg / mL。