COLOR-REACTION OF PLATINUM(II) WITH 5-(4-NITROPHENYLAZO)-8-(PARA-TOLUENESULPHONAMIDO)QUINOLINE AND ITS ANALYTICAL APPLICATIONS

被引:7
|
作者
ZHAO, JW [1 ]
XU, QH [1 ]
机构
[1] YUNNAN UNIV,DEPT CHEM,KUNMING 650091,PEOPLES R CHINA
关键词
SPECTROPHOTOMETRIC DETERMINATION; SEPARATION;
D O I
10.1016/0039-9140(91)80271-Z
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A simple, rapid and sensitive spectrophotometric method has been developed for the determination of platinum. 5-(4-Nitrophenylazo)-8-(p-toluenesulphonamido)quinoline (NPTSQ) reacts with platinum(II) almost instantaneously in alkaline solution to form a violet-red 1:2 complex with an absorption maximum at 640 nm. Beer's law is obeyed over the concentration range 0-1-mu-g/ml platinum. The molar absorptivity is 1.37 x 10(5) l.mole-1.cm-1. The method has been used for the determination of microamounts of platinum in catalysts and anode slime.
引用
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页码:909 / 912
页数:4
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