On-line preconcentration, ion chromatographic separation and spectrophotometric determination of palladium at trace level.
A new method for the determination of Pd by ion chromatography and spectrophotometric detection has been developed. The technique is based on the separation of palladium as PdCl4(2-) by anion exchange and on the detection, at a wavelength of 407 nm, of metal as PdI4(2-) after a post-column reaction with KI. The column used was an IonPac AS4 with HCl and HClO4 eluents. The eluent concentration and composition of post-column reagent were optimised in order to obtain the best separation and sensitivity for Pd. In order to reduce the detection limit, an on-line preconcentration step, has been optimised. The method, as developed, was suitable for palladium determination within a 300 ng/l D.L. value. The method applied to a BCR reference material (CRM 277, estuarine sediment) gave satisfactory results in agreement with the certified value within a D.L. value of 1.3 microg/l for the real sample.
Bruzzoniti
M C
MC
Department of Analytical Chemistry, University of Turin, Via P. Giuria 5, 10125 Turin, Italy.
Mucchino
C
C
Tarasco
E
E
Sarzanini
C
C
D000837:Anion Exchange Resins; D002852:Chromatography, Ion Exchange / Q000379:methods*; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000379:methods*
D000837:Anion Exchange Resins