oa South African Journal of Chemistry - Quantification of rhodium in a series of inorganic and organometallic compounds using cobalt as internal standard : research article
|Article Title||Quantification of rhodium in a series of inorganic and organometallic compounds using cobalt as internal standard : research article|
|© Publisher:||South African Chemical Institute (SACI)|
|Journal||South African Journal of Chemistry|
|Affiliations||1 University of the Free State, 2 University of the Free State and 3 University of the Free State|
|Publication Date||Jan 2013|
|Pages||7 - 16|
|Keyword(s)||Cobalt internal standard, ICP-OES, Quantification and Rhodium|
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 RhCl3·3H2O 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, RhCl3·3H2O and [Rh(cupf) (PPh3)(CO)(CH3)(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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