Spectrophotometric Determination of Cobalt(II) in Water after Preconcentration by Sorption of Its Nitroso R Complex with Poly(chlorotrifluoroethylene) Resint

Autor:	Li-Ping Zhang, Kikuo Terada
Rok vydání:	1994
Předmět:	inorganic chemicals Chromatography medicine.diagnostic_test chemistry.chemical_element Sorption Nitroso Analytical Chemistry chemistry.chemical_compound Adsorption chemistry Nitric acid Spectrophotometry medicine Methanol Chlorotrifluoroethylene Cobalt Nuclear chemistry
Zdroj:	Analytical Sciences. 10:161-165
ISSN:	1348-2246 0910-6340
DOI:	10.2116/analsci.10.161
Popis:	A simple and rapid method has been established for spectrophotometric determination of cobalt(II) in water after preconcentration by sorbing the nitroso R (sodium-1-nitroso-2-hydroxynaphthalene-3, 6-disulfonate) complex of cobalt(II) on poly(chlorotrifluoroethylene) resin. The cobalt-nitroso R complex was quantitatively retained on the resin as an ion associate complex with tetrabutylammonium cation in the range of pH 5.5 to 8.5. The retention capacity was41.6μg (0.71μmol) Co g-1 resin at a maximum flow rate of 30ml min-1. Cobalt retained on the resin column was completely extracted with 5ml of methanol which was submitted to spectrophotometric measurement at 550nm after 1ml of 1.0mol dm-3 nitric acid was added. The proposed method was applied to a river water sample.
Databáze:	OpenAIRE
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