摘要
本文研究了钴（Ⅱ）催化过氧化氢氧化苯基荧光酮的褪色反应，测定了反应级数和表观活化能，建立了测定痕量地的新方法。２５℃时本法检出限为２９×１０－１３ｇ／ｍｌ，线性范围为０．０４～２ｎｇ／１０ｍｌ，催化反应表观活化能为５６．１５ＫＪ／ｍｏｌ。该方法己用于维生素Ｂ１２、人发和茶叶中痕量钴的测定．结果满意，相对标准偏差为２．４～３．４％。
A new catalytic kinetic spectrophotometric method for the determination of trace cobalt(Ⅱ) based on catalytic effect of Co (Ⅱ ) on the decolorizing reaction resulted from the oxidation of phenylfluorone with hydrogen peroxide.The order of the reaction and the apparent activation energy have been determined.At 25℃,the detection limit is 2.9×10-13g/ml,the linear range 0.04～2ng/10ml and the apparent activation energy of catalytic reaction is 56.15KJ/mol.The method has been applied to the determination of trace cobalt in vitamin B12.human hair and to with satisfactory results and the relative standard deviation is 2.4～3.4 %.
出处
《中国环境监测》
CSSCI
CSCD
北大核心
1996年第4期11-13,共3页
Environmental Monitoring in China
关键词
催化光度法
苯基荧光酮
过氧化氢
钴
测定
catalytic spectrophotometry,phenylfluorone,hydrogen peroxide,cobalt determination
