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Polarographic determination of osmium with the osmium(VIII)-cerium(IV)-arsenic(III) system.

Authors
  • Zhi-Liang, J
  • Ai-Hui, L
Type
Published Article
Journal
Talanta
Publisher
Elsevier
Publication Date
Nov 01, 1990
Volume
37
Issue
11
Pages
1077–1080
Identifiers
PMID: 18965072
Source
Medline
License
Unknown

Abstract

A highly sensitive and novel polarographic method has been developed for determination of ultratrace amounts of osmium, based on the catalysis of the cerium(IV)-arsenic(III) reaction by osmium(VIII). The reaction rate is monitored by measuring the arsenic(III) with a single-sweep oscillopolarograph. Osmium concentrations from 7.0 x 10(-11) to 5.0 x 10(-9)M can be determined by the initial rate method. The method has been applied to determination of osmium in refined ore and chlorination residues with satisfactory results.

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