摘要
７－［６－甲氧基－（２－苯并噻唑偶氮）］－８－羟基喹啉－５－磺酸是一种新合成的显色剂。该试剂在弱酸性（ｐＨ４．５）介质中，与镍形成紫红色络合物。络合物的λｍａｘ＝５８０ｎｍ，表观摩尔吸光系数ε＝６．０８×１０４Ｌｍｏｌ－１ｃｍ－１，线性范围Ｎｉ（Ⅱ）０～１０μｇ／１０ｍＬ。用拟定的方法测定了合金钢及铝合金中的镍，加入回收率为９７％～１０５％，方法的相对标准偏差小于１．５％。
The synthesis of 7 [6 methoxy (2 benzothiazolylazo)] 8 hydroxy quinoline 5 sulfonic acid (6 MeO BTAQS),and the conditions of colour reaction with Ni(Ⅱ) are reported The results show that the colour reagent reacts with Ni(Ⅱ) to form a stable red complex (1∶1) in the presence of Tween 80 at pH4 5 The absorption maximum and apparent molar absorptivity is 580nm and 6 08×10 4L?mol -1 ?cm -1 respectively Beer′s law is obeyed in the range of 0￣10μg/10mL The method is highly sensitive The method has been applied to the direct determination of nickel in practical samples with satisfactory results
出处
《化学试剂》
CAS
CSCD
1998年第4期200-202,共3页
Chemical Reagents
基金
辽宁省自然科学基金
关键词
显色剂
羟基喹啉磺酸
BTAQS
分光光度法
镍
7 [6 methoxy (2 benzothiazolylazo)] 8 hydroxy quinoline 5 sulfonic acid
spectrophotometry
nickel
synthesis
