摘要
研究了新有机试剂２－（１，３，４－三氮唑偶氮）－５－二乙氨基酚（ＴＺＡＰＮ）与Ｆｅ（Ⅲ）的显色反应。（Ⅲ）在ｐＨ７．０的ＮＨ４Ａｃ级冲溶液中与ＧＺＡＰＮ形成稳定的组成比为１：３的紫色络合物，其表现摩尔吸光系数为５．４１ｘ１０４．Ｆｅ（Ⅲ）在０－１０ｕｇ／２５ｍｌ范围内服从比尔定律。所拟方法用于纯用和铝合金标样中微量铁的测定，结果满意。
In this paper,theconditions of colour reaction of new reagent 2-(1,3,4-triazolylazo)-5-diethylaminophenol with iron are reported. Results show that the new colour reagent reacts with Fe(Ⅲ)to form a stable purplecomplex(1:3)in the presence of NH4Ac(pH7.0).The absorption maximum and apparent molar absorptivity are570nm and 5.41x104L·mol-1·cm-1,respectively.Beer's law is obeyed in the range of 0-10ug Fe(Ⅲ)per 25ml.The method has been applied to the direct determination of iron in pure aluminium and aluminium alloy with satisfactory results.
出处
《冶金分析》
CAS
CSCD
北大核心
1998年第3期17-18,16,共3页
Metallurgical Analysis
关键词
铁
分光光度法
显色反应
显色剂
Triazolylazo)-5-diethylaminophenol,Spectrophotometry,Iron
