Development of chromium speciation methods for environmental samples

This is an automatically generated default intro template – please do not edit.

	Read full article
Article Title:	Development of chromium speciation methods for environmental samples
Authors:	Áron Béni1, Dávid Nagy2, Sándor Kapitány2, József Posta2,*
Affiliation:	1 Institute of Environmental Sciences, College of Nyíregyháza, Hungary 2 University of Debrecen, Department of Inorganic and Analytical Chemistry, Hungary
Abstract:	We have worked out several chromium speciation and pre-concentration methods with the use of the GFAAS technique. These methods were based on classical and continuous liquid-liquid extraction techniques using a patented continuous extraction device. For the separations and enrichments of chromium species was used ion-pair compound. As an application we have determined the Cr(III) and Cr(VI) content of water using these separation/enrichment methods and the GFAAS technique. The advantage of these methods is the cost effectiveness, high chromium species enrichment and easy use with GFAAS technique, therefore the concentration of the chromium species can be determined at the ng/L level.
Keywords:	liquid-liquid extraction, pre-concentration, chromium speciation, FAAS, GFAAS
References:	Adam J.: Extraction with long-chain amines, Talanta, 18, 91-95, 1971 Gambasidze LM., Davydova SL., Posta J., Rapoport, LM.: Device for continuous investigation of kinetic of the liquid-phase reactions Soviet patent No. 1061580/0983 Hála J., Novrátil O., Necutha V.: The solvent extraction of ion-pairs, J. Inorg. Nucl. Chem., 28, 553-561, 1966 Irving HMNH., Al-Jarrah RH.: The extraction of the chromium(III)-edta complex by solutions of Aliquat-336 in various organic solvents, Anal. Chim. Acta, 63, 79-84, 1973 Isshiki K., Sohrin Y., Karatani H., Nakayama E.: Preconcentration of chromium(III) and chromium(VI) in sea water by complexation with quinolin-8-ol and adsorption on macroporous resin, Anal. Chim. Acta, 224, 55-64, 1989 Nagy D., Béni Á., Posta J.: Cr (VI) folyadék folyadék extrakciós elválasztása és dúsítása Aliquat-336 segítségével és meghatározása GFAAS módszerrel, Centenáriumi Vegyészkonferencia, Sopron, MKE Issue, 240 pp., 2007 Posta J.: Az elemek kémiai formáinak vizsgálatára alkalmas kapcsolt méréstechnikák. In Záray Gy. (ed.): Az elemanalitika korszerű módszerei, Akadémiai kiadó, Budapest, 2006 Posta J., Gambasidze LM., Davydova SL., Rapoport LM.: Készülék folyadék fázisú reakciók folyamatos követésére, Magyar szabadalom, 194071/1988 Posta J., Lakatos J.: Egyszerű folyamatos titráló módszer lángatomizációs folyamatok vizsgálatához, Magy. Kém. Folyóirat, 86, 284-287, 1980 Posta J., Lakatos J.: A simple continuous titration method for the investigation of flame atomization processes, Spectrochim. Acta, 35B, 601-606, 1980 Sekine T, Hasegawa Y.: Solvent extraction chemistry: Fundamentals and applications, Marcel Dekker, New York, 1977 Wehrli S, Ein Apparat zur Extraktion von Lösungen mit schweren Lösungsmitteln, Helv. Chim. Acta, 20, 927-931, 1937.
*Correspondence:	József Posta, University of Debrecen, Faculty of Science and Technology, Department of Inorganic and Analytical Chemistry, P.O: Box 18, H-4010 Debrecen, Hungary, Tel:+36-(52)-512900, Fax: +36-(52)-512900, e-mail: postaj@tigris.unideb.hu