| 荧光熄灭法测定微量氟的研究和应用 |
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| 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. |
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| 作者姓名： | 崔万苍 米俐 史慧明 |
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| 作者单位： | 南开大学化学系 |
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| 基金项目： | 中国科学院科学基金资助 |
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| 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.
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| 关 键 词： | 荧光分析 水质分析 环境监测 氟 锆 磺酸 猝灭效应 羟基喹啉类 |
Determination of microamount of fluoride by the quenching fluorescence |
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| CUI WANCANG,MI LI,SHI HUIMING.Determination of microamount of fluoride by the quenching fluorescence[J].Acta Chimica Sinica,1987,45(9):913-915. |
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| Authors: | CUI WANCANG MI LI SHI HUIMING |
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| 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. |
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| Keywords: | FLUORIMETRIC ANALYSIS WATER QUALITY ANALYSIS ENVIRONMENTAL MONITORING FLUORINE ZIRCONIUM SULFONIC ACID QUENCHING EFFECTS HYDROXY QUINOLINES |
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