摘要
本文详细地研究了新显色剂４－（２－苯并噻唑偶氮）焦酚与钨（Ⅵ）和ＣＴＭＡＢ的显色反应及配合物结构。实验表明，在ｐＨ２．７时，钨与显色剂反应形成稳定的、带负电荷的１：２紫红色配合物。该配合物的λ＿（ｍａｘ）为５５５ｎｍ，表观摩尔吸光系数为８．８２×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）。所拟定的分析方法已满意地用于钢铁中微量钨的光度法分析。
It is reported in this paper that 4-(2-benzothia-zolylazo ) pyrogallol(BTAPG),a new organicreagent, reacts with W(Ⅵ)in the presence ofCTMAB to form a stable violet-red complex with acomposition ratio of 2 : 1. Its absorption maximum isat 555nm and ε_(555) is 8.82×10￣4L· mol￣(-1)·cm￣(-1). Thestructure of the complex was suggested.The analyti-cal procedure has been developed for the spectropho-tometric determination of trace tungsten in steels andsatisfactory results were obtained.
出处
《分析试验室》
CAS
CSCD
北大核心
1994年第4期21-23,共3页
Chinese Journal of Analysis Laboratory
关键词
钨
焦Bei酚
分光光度法
BTAPG
Tungsten
4-(2-benzothiazolylazo)pyrogallol
spectrophomentry
steel
