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．
出处
《冶金分析》
CAS
CSCD
北大核心
1995年第3期23-25,共3页
Metallurgical Analysis
