Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/99367
Type: Artigo de periódico
Title: Selective Spectrophotometric Determination Of Trace Amounts Of Chromium(vi) Using A Flow Injection System With A Microcolumn Of Zirconium(iv) Oxide Modified Silica Gel
Author: Peixoto C.R.M.
Gushikem Y.
Baccan N.
Abstract: Zirconium(IV) oxide coated on a silica gel surface was found to be very effective for extracting CrVI from aqueous solutions at a pH of about 3. A microcolumn packed with this material was inserted into a flow injection system for the separation and preconcentration of CrVI. By this process, a concentration level of 2 ppb was detected with a relative standard deviation of 2.4%. Because of the high selectivity of the immobilized substrate, it was possible to determine CrVI in the presence of larger amounts of other ions. The analysis was also carried out on natural water spiked with CrVI, and compared with a standard method.
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Rights: aberto
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Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-0000874372&partnerID=40&md5=409769dd5af2b9d71272b1ef1a69fa51
Date Issue: 1992
Appears in Collections:Unicamp - Artigos e Outros Documentos

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