摘要
报道了新显色剂２－（５－羧基－１，３，４－三氮唑偶氮）－５－二乙氨基酚（ＣＴＺＡＰＮ）分光光度法测定钒的条件。在ｐＨ７的ＮＨ４Ａｃ缓冲溶液中，ＣＴＺＡＰＮ与Ｖ（Ⅴ）形成稳定的紫红色配合物，其配合比Ｖ（Ⅴ）∶Ｒ＝１∶１，λｍａｘ＝５４０ｎｍ，摩尔吸光系数２．３２×１０４Ｌ·ｍｏｌ－１·ｃｍ－１。Ｖ（Ⅴ）在０～１μｇ／ｍＬ范围内符合比耳定律，且具有良好的选择性。所建立的方法已用于实际样品中钒的测定，结果满意。
n this paper,the conditions of colour reaction of a new reagent 2(5carboxy1,3,4triazolylazo)5diethylamino phenol with vanadium are reported.Results show that the new colour reagent reacts with V() to form a stable red complex (11) at pH7.The absorption maximum and apparent molar absorptivity are 540nm and 2.32104Lmol-1cm-1 respectively.Beers law is obeyed in the range of 01g/mL.The method is highly sensitive and selective and has been applied to the direct determination of vanadium in practical samples with satisfactory results.
出处
《化学试剂》
CAS
CSCD
1999年第3期179-180,182,共3页
Chemical Reagents
基金
浙江省自然科学基金
关键词
CTZAPN
分光光度法
钒
测定
显色剂
carboxy1
3
4triazolylazo)5diethylamino phenol
spectrophotometry
vanadium
