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