Reversed-phase HPLC determination of some noble metals as their thiazolylazoresorcinol chelates

The first use of 4-(2-thiazolylazo)resorcinol (TAR) as a chelating reagent in the reversed-phase HPLC separation and determination of Os, Rh and Ru is reported. A precolumn derivatization method is used, followed by separation on an octadecyl-bonded silica stationary phase with a methanol-water mobi...

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Bibliographic Details
Published in:Talanta (Oxford) 1991-06, Vol.38 (6), p.669-672
Main Authors: Qiping, Liu, Huashan, Zhang, Jieke, Cheng
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Chromatographic methods and physical methods associated with chromatography
Exact sciences and technology
Other chromatographic methods
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Summary:The first use of 4-(2-thiazolylazo)resorcinol (TAR) as a chelating reagent in the reversed-phase HPLC separation and determination of Os, Rh and Ru is reported. A precolumn derivatization method is used, followed by separation on an octadecyl-bonded silica stationary phase with a methanol-water mobile phase. The coloured complexes of Os, Rh, and Ru are completely separated within 8 min with a 60:40 v/v methanol-water mixture (pH 4.0, tetrabutylammonium as counter-ion). The detection limits for Rh, Ru and Os at 550 nm are 5, 6 and 17 ng/ml respectively. Recoveries of 94–102% have been obtained for these trace noble metals in analysis of anode slime.
ISSN:0039-9140
1873-3573
DOI:10.1016/0039-9140(91)80154-R