摘要
基于盐酸介质中，钼（Ⅵ）催化盐酸联氨还原橙黄Ⅳ的反应，建立了动力学分光光度法测定痕量钼的新方法。本法检出限为３．７×１０^（－３）μｇ／ｍＬ，测定钼量范围为０．０２５～１．８μｇ／ｍＬ；已将此法用于测定绿豆中的钼及钼酸铅和钼酸钡的溶度积。
A new catalytic spectrophotometric method for the determination of trace amount of Mo(Ⅵ) has been developed.The method is based on the catalytic effect of Mo(Ⅵ) on the reduction of orange Ⅳ with diamine hydrochloride. The effects of the solution PH,the reagent concentration and interfering ions on reaction rate have been studied.At.different temperatures,the linear range of determination is 0.025-1.8 μg/ mL for molybdenum.The detection limit is 3.7×10-3 μg/mL,the relative standard deviation is 2.6%.The apparent activation energy of catalytic reaction is 46.0kJ/ mol.The method has been used to determine trace molybdenum in bean samples and the solubility product of both lead molybdate and barium molybdate.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1994年第1期23-26,共4页
Chemical Journal of Chinese Universities
基金
福建省自然科学基金
关键词
催化光度法
橙黄Ⅳ
钼
盐酸联氨
Catalytic spectrophotometry,Orange Ⅳ,Molybdenum
