硼锑钼杂多酸─丁基罗丹明B四元络合体系分光光度法测定钢中微量硼  

Spectrophotometric Determination of Micro Amounts of Boron in Steel with Boroamtimonomolybdat-BRB System

作　　者：陈莉华[1] 赵立刚[1] 

机构地区：[1]吉首大学化学系

出　　处：《冶金分析》1995年第3期23-25,共3页Metallurgical Analysis

摘　　要：本文研究了用锑钼杂多酸与工基罗丹明Ｂ的显色反应。在盐酸介质中，硼锑钼形成的杂多酸被抗坏血酸还原成钼蓝型并与工基罗丹明Ｂ形成四元组合体系，经聚乙烯醇增溶，直接在水相中测其吸光度，最大吸收波长城９０ｎｍ，表现摩尔吸光系数ε＿５９０＝２．０３×ｌ０￣５，硼浓度在０．２～２．０μｇ／２５ｍｌ范围内服从比尔定律。方法用于分析钢中微量酸溶硼，获得满意结果。In this paper， a spectrophotometric method was described for the determination of B based on the ion-associatecomplex formed by heteropoly acid with BRB in the presence of PVA-124 and vitamin C．Its maxium molar absorptivity is 2．O3 × l0~5 L· mol^-1· cm ^-1．Beer’s law is obeyed in the rang of O．2 to 2．0 μg per 25m．The methocl has been applied to the determination of boron in steel with satisfactory results．

关 键 词：硼 丁基罗丹明B 分光光度法 钢 测定 微量硼 

分 类 号：TG142.15[一般工业技术—材料科学与工程] O613.81[金属学及工艺—金属材料]