| 基于痕量联苯胺阻尼作用的荧光光度分析 |
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| 引用本文： | 张涛,樊静,崔凤灵,冯素玲.基于痕量联苯胺阻尼作用的荧光光度分析[J].分析试验室,2006,25(10):52-55. |
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| 作者姓名： | 张涛 樊静 崔凤灵 冯素玲 |
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| 作者单位： | 河南师范大学化学与环境科学学院,河南省环境污染控制重点实验室,新乡,453007 |
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| 基金项目： | 河南省自然科学基金;河南省重点实验室基金 |
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| 摘 要： | 在HCl介质中，联苯胺的存在对KBrO3氧化吡咯红反应有抑制作用，据此建立了测定痕量联苯胺的荧光动力学新方法。对方法的介质条件、试剂用量、干扰物质影响进行了系统研究。在最佳实验条件下，方法的线性范围为30～400ng／mL，检出限为14．4ng／mL，对11份浓度为80ng／mL，300ng／mL的联苯胺标准溶液进行平行测定，相对标准偏差分别为2．1％和1．2％。本法用于塑料和雨水中联苯胺的测定，回收率为97．8％～102．1％。
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| 关 键 词： | 荧光动力学分析 盐酸联苯胺 吡咯红 环境样品 |
| 文章编号： | 1000-0720（2006）10-052-04 |
| 收稿时间： | 2005-11-30 |
| 修稿时间： | 2005-11-302006-01-20 |
Inhibitory kinetic fluorimetric determination of trace benzidine |
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| ZHANG Tao,FAN Jing,CUI Feng-ling,FENG Su-ling.Inhibitory kinetic fluorimetric determination of trace benzidine[J].Chinese Journal of Analysis Laboratory,2006,25(10):52-55. |
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| Authors: | ZHANG Tao FAN Jing CUI Feng-ling FENG Su-ling |
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| Institution: | School of Chemical and Znvironmented Sciences, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang 453007 |
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| Abstract: | A new kinetic fluorimetric method is established for the determination of trace benzidine. The proposed method is based on the inhibitory effect of benzidine on the oxidation reaction of pyrrole-red by potassium bromate in hydrochloric acid medium. It is shown that the detection limit and linear range for benzidine are 14.4 and 30 - 400 ng/mL, respectively under the optimum experimental conditions. Relative standard derivations of eleven measurements for 80 and 300 ng/mL benzidine solutions are 2.1% and 1.2%, respectively. This method has been used to determine trace of benzidine in plastics and rainwater with recoveries of 97.8% - 102.1%. |
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| Keywords: | Kinetic spectrofluorimetry Benzidine Pyrrole-red Environmental samples |
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