Zhao J, Xu Q
Department of Chemistry, Yunnan University, Kunming, 650091, People's Republic of China.
Talanta. 1991 Aug;38(8):909-12. doi: 10.1016/0039-9140(91)80271-z.
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 mug/ml platinum. The molar absorptivity is 1.37 x 10(5) 1.mole(-1).cm(-1). The method has been used for the determination of microamounts of platinum in catalysts and anode slime.
已开发出一种简单、快速且灵敏的分光光度法来测定铂。5-（4-硝基苯偶氮）-8-（对甲苯磺酰胺基）喹啉（NPTSQ）在碱性溶液中几乎能瞬间与铂（II）反应，形成一种紫红色的1:2络合物，其最大吸收波长为640nm。在铂浓度为0 - 1μg/ml范围内符合比尔定律。摩尔吸光系数为1.37×10⁵ l·mol⁻¹·cm⁻¹。该方法已用于测定催化剂和阳极泥中的微量铂。
