【摘要】 基于S^2-对固定于增塑的聚氯乙烯膜上的荧光素汞的荧光熄灭，研制了S^2-选择性光化学敏感膜。该膜测定S^2-的浓度范围为10^-9mol/L¹0^－6mol/L，其荧光信号具有选择性强、重现性高且可逆的特点，适用于水相中硫化物的测定。更多还原

【Abstract】 A new reversible optical sensing membrane for the determination of S^2- based on fluoreascence queching of mercury fluorescein dissovled in plasticized polyvinyl chloride has been developed. With the optimum sensing membrane described, the concentration of10^-6 mol/L to 10^-9 mol/L of S^2- can be determined. Basides, its optical signals exhibit higg reproducibility and a good selectivity. It can be used for determination of sulfide in water Samples.更多还原