钼(Ⅵ)-溴酸钾-萘酚绿B体系动力学光度法测定痕量钼  

Kinetic-Spectrophotometric Determination of Trace Molybdenum with the Naphthol Green B-Mo(Ⅵ)-KBrO_3 System

作　　者：朱化雨[1] 朱敏 闫丽[1] 

机构地区：[1]临沂师范学院化学与资源环境学院,山东临沂276005 [2]临沂市第十五中学,山东临沂276000

出　　处：《临沂师范学院学报》2009年第6期65-67,共3页Journal of Linyi Teachers' College

摘　　要：在氨水介质中以氨三乙酸为活化剂,KBrO_3氧化萘酚绿B的反应受Mo(VI)的催化而加速,据此建立了催化光度法测量痕量钼的新方法;选择了影响反应速率的最佳条件,测定了反应的表观活化能;方法的检出限为1.6×10^(-9)g/mL,线性范围为0～0.24μg/mL.用于水和食品中痕量钼的测定,获得满意结果.A Kinetic-spectrophotometric method for the determination of trace molybdenum was studied. The method is based on the molybdenum （VI） catalyzing the oxidation of Naphthol green B by potassium bromate in the medium of ammonia and using nitrilotriacetic acid as activator. The optimal reaction conditions and the apparent activation energy were determined. The detection limit was 1.6×10^-9g/ml and the linear range of method was 0-0.24μg/ml. This method has been used to determine trace Mo （VI） in water and human serum with satisfactory results.

关 键 词：动力学光度法 钼 萘酚绿B 溴酸钾 

分 类 号：O657.32[理学—分析化学]