溴酸钾-RB体系催化动力学光度法测定痕量钒  

Catalytic kinetic spectrophotometric determice vanadium(V) by system of potassium peridate oxidation remazol brilliant blue R

作　　者：陈华萍[1] 王照丽 黄乾明[1] 印家健[1] 

机构地区：[1]四川农业大学生命科学与理学院,四川雅安625014 [2]成都市环境保护科学研究院,四川成都610072

出　　处：《化学研究与应用》2008年第4期426-429,共4页Chemical Research and Application

基　　金：国家863计划项目(2006AA10Z1F8和2006AA10Z179)资助;四川农业大学科技创新基金项目(007311)资助

摘　　要：钒是人体不可缺少的微量元素之一，人体中钒含量过高或过低都会影响人体的新陈代谢，从而引起不适应症状甚至病变。钒主要存在于岩石矿物中，钢铁、淤泥、废水、食品甚至于人的头发中也含有微量钒。A catalytic kinetic spectrophotometric method for the determination of trace vanadium （V） based on the redox reaction between potassium bromate and remazol brilliant blue R in the presence of aseorbie acid as an activator in acetic acid medium has been proposed. The optimum conditions and kinetic parameters have been in vestigated. The calibration graph is linear for 0- 6.4μg·L^-1 V（V）. The detection limit for vanadium （V） is 3.4×10^11g·mL^-1. The catalytic and non - catalytic reactions are the first -order on vanadium （V）. The apparent activation energy of the catalytic reaction is 69. 84 KJ·mol^-1. The Relative Standard Deviations（RSD） are 0. 53% and the recoveries are 96. 7 % - 100.3 %. The method has been applied to the determination of trace vanadium （V） in water and flour samples with satisfactory results.

关 键 词：动力学光度法 钒 RB亮蓝 

分 类 号：O657.32[理学—分析化学]