oa South African Journal of Chemistry - Quantification of rhodium in a series of inorganic and organometallic compounds using cobalt as internal standard : research article

Volume 66, Issue 1
  • ISSN : 0379-4350



An analytical method for the quantification of rhodium using inductively coupled plasma optical emission spectrometry (ICP-OES) and cobalt as internal standard was developed. Rhodium recovery was determined in different samples, which included a certified reference material (CRM), pure rhodium metal, inorganic RhCl·3HO salt as well as different organometallic compounds. Excellent rhodium recoveries of 100, 100, 99.0 and 99.7 % with relative standard deviations (RSD) of 1.0, 1.0, 0.3 and 0.4 % were obtained for the CRM, rhodium metal sample, RhCl·3HO and [Rh(cupf) (PPh)(CO)(CH)(I)], respectively. The accurate recovery of rhodium was, however, affected by the presence of easily ionized elements (EIE) and unmatched acid matrixes with a decrease in rhodium recovery of up to 16%. Validation parameters such as accuracy, precision, specificity, limit of detection (LOD) and robustness were all investigated to confirm the suitability of this newly developed analytical procedure for rhodium determination.

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