摘要
本文研究了在HCl与H_3pO_4的混合酸介质中,乳化剂OP存在下,铬(Ⅵ)与2.7-二溴茜素紫(DBV)的显色反应。配合物组成Cr(Ⅵ):DBV=1:3,表观摩尔吸光系数为2.74×10~4L·mol^(-1).cm^(-1)(λmax=416nm)。反应的选择性高,常见金属离子均不干扰铬(Ⅵ)的测定,拟定了用二溴茜素紫分光光度法测定金属材料中铬的方法。
In the presence of emulsifier octyl-phenyl polyglycol ether, the colour reaction of dibromoalizarin violet with Cr(Ⅵ) has been studied in a mixed acid medium of 0. 3mol/L HCl and 0. 6mol/L H_3PO_4. The molar absorptivity is 2. 7×10~4 L·mol^(-1)·cm^(-1) (λ_(max)=416nm). The common ions do not interfere with the determination of Cr. Based on the reaction, a Spectrophotometric method for the determination of Cr has been established and used for the determination of Cr in metallic materials with satisfactory realts.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1990年第10期893-896,共4页
Chinese Journal of Analytical Chemistry
关键词
铬
二溴茜素紫
光度法
金属材料
Spectrophotometry
Chromium
Dibromoalizarin violet
