DIRECT SPECTROPHOTOMETRIC DETERMINATION OF PLATINUM USING THIOCARBOHYDRAZIDE AS A REAGENT

Authors
CHOPRA S MALIK AK RAO ALJ
Citation
S. Chopra et al., DIRECT SPECTROPHOTOMETRIC DETERMINATION OF PLATINUM USING THIOCARBOHYDRAZIDE AS A REAGENT, Revue Roumaine de Chimie, 39(2), 1994, pp. 143-148
Citations number
8
Categorie Soggetti
Chemistry
Journal title
Revue Roumaine de Chimie → ACNP
ISSN journal
00353930
Volume
39
Issue
2
Year of publication
1994
Pages
143 - 148
Database
ISI
SICI code
0035-3930(1994)39:2<143:DSDOPU>2.0.ZU;2-8
Abstract
A direct spectrophotometric method has been developed for the determin ation of platinum using thiocarbohydrazide as complexing reagent. Plat inum reacts with thiocarbohydrazide in the pH range of 5.5-8.0 and in the ratio of 1:2 (metal:ligand). It absorbs strongly at 495 nm. Beer's law is obeyed over the concentration range of 2.0-11.22 ppm. The mola r absorptivity and Sandell's sensitivity are calculated to be 6.4 x 10 (3) L.mole-1 cm-1 and 0.0029 mug/cm2. The method has been applied for the determination of platinum in various synthetic samples.