二氯荧光素-氯化十六烷基吡啶荧光猝灭法测定微量碘  

A Fluorescence Quenching Method for the Determination of Trace Iodide With Dichlorofluorescein and Cetyl Pyridine Chloride

作　　者：龚国权[1] 贾丽[1] 苏琛 

机构地区：[1]兰州大学化学系,兰州730000

出　　处：《分析化学》1994年第5期465-467,共3页Chinese Journal of Analytical Chemistry

摘　　要：本文研究了用二氯荧光素(DCF)-氯化十六烷基毗啶(CPC)体系荧光猝灭法测定微量碘。在pH为2.8～3.1的H_2SO_4介质中,检出限为0.30μg/25ml,线性范围为0.30～2.00μg/25ml。本法灵敏度高,选择性好,适用于微量碘的测定。A highly sensitive and selective fluorescence quenching method was developed for the determination of iodide (I^- ) with dichlorofluorescein (DCF) as fluorigenic reagent and cetyl pyridine chloride (CPC) as solubilizing agent. In the medium of sulfuric acid solution at pH 2.8-3.l,its maximum excitation wavelength is 528 nm and its maximum emission wavelength is 540 nm. The detection limit is 0. 3 μg/25ml,the linear calibration range is 0. 3-2. 0 μg/25ml. The method has been used for the determination of trace I^- in synthetic brine with satisfactory results.

关 键 词：碘 DCF CPC 荧光猝灭法 测定 

分 类 号：O613.44[理学—无机化学]