Cu(Ⅱ)对显色体系DAmEM-V(Ⅴ)-H_3PO_4-Mn(Ⅱ)-Tween20阻抑作用的研究  

作　　者：韦世全 蒙丹军[2] 林会松[2] 

机构地区：[1]广西建筑工程学校,广西南宁530003 [2]广西职业技术学院,广西南宁530227

出　　处：《化工技术与开发》2000年第S1期182-183,186,共3页Technology & Development of Chemical Industry

摘　　要：在酸性介质中Cu(Ⅱ )能阻抑试剂DAmEM与V(Ⅴ )的显色反应。本文研究了该反应的动力学参数。反应的表观速率常数Ka=8.867× 1 0 - 2 /min ,表观活化能Ea=37.795kJ/mol。基于这种阻抑作用建立了一种测定Cu(Ⅱ )的动力学分光光度法 ,Cu(Ⅱ )在 1 .0 0～ 8.0 0 μg/2 5mL内准确检出。In acidic medium the copper(Ⅱ) inhibits the rate of colour reaction system in DAmEM-V(Ⅴ)-H 3PO 4-Mn(Ⅱ)-Tween20.The kinetic parameters of the inhibited reaction are studied.Rate of reaction apparent constant(ka)is 8.867×10 -2 /min and energy of activation(Ea) is 37.795 kJ/mol.On the basis of such a inhibition,a kinetic spectrophotometry determining trace copper(Ⅱ) is astablished.Copper(Ⅱ) can be determinated accurately in range of 1.00～8.00 μg/25 mL.

关 键 词：二安替比林间乙氧基苯基甲烷(DAmEM) 动力学分光光度法 阻抑作用 Cu(Ⅱ) 

分 类 号：O657.3[理学—分析化学]