Determination of platinum and ruthenium in Pt and Pt-Ru catalysts with carbon support by direct and derivative spectrophotometry

被引：39

作者：

Balcerzak, M ^{[1
]}

Swiecicka, E ^{[1
]}

Balukiewicz, E ^{[1
]}

机构：

[1] Warsaw Univ Technol, Dept Analyt Chem, PL-00664 Warsaw, Poland

来源：

TALANTA | 1999年 / 48卷 / 01期

关键词：

noble metals analysis; platinum; ruthenium; derivative spectrophotometry;

D O I：

10.1016/S0039-9140(98)00212-4

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Platinum and ruthenium in carbon supported Pt and Pt-Ru catalysts were determined by direct and derivative spectrophotometric methods. Complexes of platinum and ruthenium with SnCl3- ligands (tin(II) chloride in HCl) were used to determine both metals in solutions obtained after digestion of the samples of the catalysts. Platinum in the Pt/C catalyst can be determined in solutions obtained by digestion of the samples in aqua regia. Derivative spectrophotometry was used to determine both metals in the presence of each other in solutions obtained after digestion of samples of the Pt-Ru/C catalyst in the mixture of HCl + HNO3 (6:1). The first derivative at 377 nm ('zero-crossing' point of ruthenium) and the second-derivative values at 495 nm ('zero-crossing' point of platinum) were used to estimate the concentration of platinum and ruthenium, respectively. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：39 / 47

页数：9

共 14 条

[1] INVESTIGATION OF A CARBON-SUPPORTED QUATERNARY PT-RU-SN-W CATALYST FOR DIRECT METHANOL FUEL-CELLS [J].