title: Trace determination of platinum-I. A catalytic method using pulse polarography.
abstract: Experimental conditions are given for the development of a well-defined catalytic polarographic wave for PT(II) after chelation with ethylenediamine. Direct-current polarographic studies of the wave characteristics indicate that it is of the catalytic hydrogen type, sensitive to pH changes, temperature, and electrode characteristics. By differential pulse polarography a single, sharp peak at -1.62 V is obtained, allowing trace determination of Pt(II) in the range 0.01-1.0 ppm with a linear calibration and a detection limit of 0.003 ppm. The catalytic wave is shown to suffer little interference from other platinum-group metals at 1:1 concentration ratio to Pt, except for Rh(III).
authors.affiliation: Department of Analytical Chemistry, University of N.S.W., P.O. Box 1, Kensington, Australia 2033.
authors.forename: P W
authors.initials: PW
authors.lastname: Alexander
authors.forename: R
authors.initials: R
authors.lastname: Hoh
authors.forename: L E
authors.initials: LE
authors.lastname: Smythe