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％。
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%.
出处
《分析试验室》
CAS
CSCD
北大核心
2006年第10期52-55,共4页
Chinese Journal of Analysis Laboratory
基金
河南省自然科学基金(0511021200)
河南省环境污染控制重点实验室资助项目
关键词
荧光动力学分析
盐酸联苯胺
吡咯红
环境样品
Kinetic spectrofluorimetry
Benzidine
Pyrrole-red
Environmental samples
