环丙沙星荧光猝灭法测定环境水样中铀

Fluorescence quenching method for the determination of uranium in environmental water samples by ciprofloxacin

建立了一种测定水样中痕量铀的荧光猝灭新方法,在pH=6.0的BR（磷酸、乙酸、硼酸混合溶液）缓冲溶液中,双氧铀与环丙沙星形成配合物,使环丙沙星的荧光强度减弱,在2.3×10-8~1.0×10-6mol/L浓度范围内,荧光强度的改变值ΔF与UO22＋浓度呈线性关系,方法的检出限为7.0×10-9mol/L。用于环境水样的检测,回收率为92.0%~106.0%。方法简单、快速、灵敏度高。

A new fluorescence quenching method was established to determine UO22＋ in water.UO22＋ reacted with CIP to form a complex in the buffer of BR（pH=6.0）.The fluorescence intensity was linear to the concentration of UO22＋ in the range of 2.3×10-8~1.0×10-6 mol/L with the detection limit of 7.0×10-9 mol/L.The method was applied for the determination of water uranyl.The recoveries obtained were 92.0%~106.0%.