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Ion chromatographic analysis of cyanate in gold processing samples containing large concentrations of metallo-cyanide complexes

Citation

Fagan, PA and Paull, B and Haddad, PR and Dunne, R and Kamar, H, Ion chromatographic analysis of cyanate in gold processing samples containing large concentrations of metallo-cyanide complexes, Journal of Chromatography A, 770, (1-2) pp. 175-184. ISSN 0021-9673 (1997) [Refereed Article]


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DOI: doi:10.1016/S0021-9673(96)01027-8

Abstract

An ion chromatographic (IC) method was developed for the determination of cyanate in gold cyanidation samples containing large concentrations of metallo-cyanide complexes. The analysis was performed on a Waters HC IC-Pak A anion-exchange column with an anthranilic acid eluent, with detection achieved using indirect UV at 355 nm. Two procedures were developed for removal of the metallo-cyanide complexes prior to the IC analysis. The first was a manual off-line method which used solid-phase extraction cartridges containing a strong anion-exchange resin to trap the complexes and to then enable determination of cyanate without interference. In the second approach, an automated on-line method was developed which used an anion-exchange guard column to trap the complexes and a column switching valve to allow backflushing of the cyanate from the guard column. This enabled the total analysis to be performed in a time of 1014 min, depending on the sample composition. Finally, a comparison of results obtained by the standard Kjeldahl nitrogen method for cyanate and the IC method revealed an interference in the Kjeldahl method for samples containing large concentrations of Cu(I)-cyanide complexes.

Item Details

Item Type:Refereed Article
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Instrumental Methods (excl. Immunological and Bioassay Methods)
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Fagan, PA (Mr Peter Fagan)
Author:Paull, B (Professor Brett Paull)
Author:Haddad, PR (Professor Paul Haddad)
ID Code:12323
Year Published:1997
Web of Science® Times Cited:9
Deposited By:Chemistry
Deposited On:1997-08-01
Last Modified:2010-03-01
Downloads:0

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