Selective spectrophotometric determination of trace amounts of chromium(VI) using a flow injection system with a microcolumn of zirconium(IV) oxide modified silica gel

Details are given of procedure for spectrophotometric determination of traces of hexavalent chromium, involving on-line separation and pre-concentration of the chromium at pH 3 in a microcolumn packed with zirconium oxide coated on a silica-gel surface inserted into a flow-injection system. A chromi...

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Bibliographic Details
Published in:Analyst (London) 1992, Vol.117 (6), p.1029-1032
Main Authors: Peixoto, Carlos R. M., Gushikem, Yoshitaka, Baccan, Nivaldo
Format: Article
Language:English
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Summary:Details are given of procedure for spectrophotometric determination of traces of hexavalent chromium, involving on-line separation and pre-concentration of the chromium at pH 3 in a microcolumn packed with zirconium oxide coated on a silica-gel surface inserted into a flow-injection system. A chromium concentration of 2 ppb could be detected, with a relative standard deviation of 2.4 per cent. The immobilized zirconium oxide showed high selectivity, making it possible to determine chromium in the presence of greater amounts of other ions.
ISSN:0003-2654
1364-5528
DOI:10.1039/an9921701029