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荧光熄灭法测定微量氟的研究和应用
引用本文:崔万苍,米俐,史慧明. 荧光熄灭法测定微量氟的研究和应用[J]. 化学学报, 1987, 45(9): 913-915
作者姓名:崔万苍  米俐  史慧明
作者单位:南开大学化学系
基金项目:中国科学院科学基金资助
摘    要:在环境监测中微量F~-的分析受到很大的重视.过去采用了分光光度法、离子选择电极法和荧光光度法,前两种方法选择性好,但灵敏度略低;荧光光度法灵敏度较高,可直接测定简单样品中的微量氟.在测定氟的荧光方法中,均是采用荧光熄灭法.此法的特点是灵敏度高,但操作繁琐,很少用于实际样品分析.我们研究了氟的几个新体系,从中筛选出灵敏度高、操作简便的锆-8-羟基喹啉-5-磺酸体系.在水溶液中测定,1μg F~-使体系荧光强度下降68%,与文献报道的体系相比是较高的.本法灵敏度为0.002μgF~-/mL,是测定氟的最灵敏方法之一.

关 键 词:荧光分析  水质分析  环境监测      磺酸  猝灭效应  羟基喹啉类  

Determination of microamount of fluoride by the quenching fluorescence
CUI WANCANG,MI LI,SHI HUIMING. Determination of microamount of fluoride by the quenching fluorescence[J]. Acta Chimica Sinica, 1987, 45(9): 913-915
Authors:CUI WANCANG  MI LI  SHI HUIMING
Abstract:Several fluorimetric systems were investigated for possible application in the determination of trace amts. of F- based on the fluorescence quenching principle. The fluorescence of Zr-8-hydroxyquinoline-5-sulfonic acid chelate (I) was 68% quenched in the presence of 1 mg F-. The optimum reaction conditions, composition, and apparent stability constant of I were determine The sensitivity of the method is 0.002 mg F-/mL. The F- content of water samples was determine with satisfactory accuracy and precision.
Keywords:FLUORIMETRIC ANALYSIS  WATER QUALITY ANALYSIS  ENVIRONMENTAL MONITORING  FLUORINE  ZIRCONIUM  SULFONIC ACID  QUENCHING EFFECTS  HYDROXY QUINOLINES
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