Issue 2, 1996

Comparison of various forms of palladium used as chemical modifiers for the determination of selenium by electrothermal atomic absorption spectrometry

Abstract

The efficiencies of various chemical modifiers based on palladium for the determination of selenium in the presence of sodium chloride by electrothermal atomic absorption spectrometry were investigated. Palladium nitrate proved to be superior to palladium chloride for selenium only in pure solutions. In the presence of a chloride matrix, these two chemical modifiers are of similar and rather low effectiveness, whereas ammonium dioxalatopalladate(II), colloidal palladium and a mixture of palladium nitrate and diammonium hydrogen citrate were found to be more effective. Using these latter modifiers, the chloride matrix does not prevent the formation of metallic palladium at relatively low temperatures. However, maximum modification efficiency was obtained with prereduced (at 1000 °C) palladium. Using this form of palladium as a chemical modifier, up to 330 µg of sodium chloride do not interfere in the determination of 2 ng of selenium. The relatively low effectiveness of colloidal palladium, which was stabilized with a polymer compound, could be explained by the formation and partial loss of volatile organoselenium compounds. Also, the surface of colloidal palladium is screened off by the polymer causing a rather low accessibility for selenium species.

Article information

Article type
Paper

J. Anal. At. Spectrom., 1996,11, 159-164

Comparison of various forms of palladium used as chemical modifiers for the determination of selenium by electrothermal atomic absorption spectrometry

A. B. Volynsky and V. Krivan, J. Anal. At. Spectrom., 1996, 11, 159 DOI: 10.1039/JA9961100159

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements