University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Geological -> ore -> pyrite

Citations 1

"Determination Of Trace Amounts Of Cobalt By Flow Injection With Spectrophotometric Detection"
Analyst 1994 Volume 119, Issue 7 Pages 1553-1556
Krystyna Pyrzynska, Zofia Janiszewska, Joanna Szpunar-Lobinska and Merek Trojanowicz

Abstract: A flow injection system featuring a glass microcolumn (2 cm x 2 mm i.d.) packed with alumina was used to pre-concentrate Co online as cobalt-nitroso-R-salt. Elution was effected with 0.1 M NaOH. Detection was at 520 nm with use of a Hewlett-Packard Model 8452A spectrophotometer. The detection limit for a 10 min pre-concentration was 3.5 ng/ml and the RSD at 20 ng/ml was 3.1%. The main interference was from Cu(II) which can be removed as sulfide. The method was used to determine Co in oriental tobacco leaves and pyrite ore certified reference materials.
Cobalt Spectrophotometry Reference material Preconcentration Interferences Alumina Column