SCREENING OF SOME TRANSITION METAL IONS AND QUANTITATIVE DETERMINATION OF COPPER, CADMIUM AND ZINC BY SOLID PHASE DERIVATIVE SPECTROPHOTOMETRY

A simple solid phase spectrophotometric method for both screening of eight transition metal ions plus lead and quantitative determination of copper, cadmium and zinc is described. The method is based on the preparation of a sensitive analytical zone by immobilization of the organic reagent 1-(2-pyri...

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Autores principales:	Tora,M. Inés, Lara,Nelson, Narváe,Jéssica, Richte,Pablo
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2004
Materias:	Simultaneous determination Screening transition metal ions solid phase derivative spectrophotometry
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072004000200011
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spelling	oai:scielo:S0717-970720040002000112005-09-21SCREENING OF SOME TRANSITION METAL IONS AND QUANTITATIVE DETERMINATION OF COPPER, CADMIUM AND ZINC BY SOLID PHASE DERIVATIVE SPECTROPHOTOMETRYTora,M. InésLara,NelsonNarváe,JéssicaRichte,Pablo Simultaneous determination Screening transition metal ions solid phase derivative spectrophotometry A simple solid phase spectrophotometric method for both screening of eight transition metal ions plus lead and quantitative determination of copper, cadmium and zinc is described. The method is based on the preparation of a sensitive analytical zone by immobilization of the organic reagent 1-(2-pyridylazo)-2-naphthol (PAN) in a Dowex 50WX2-100 resin, in which Cd, Cu, Zn, Co, Fe, Ni, Ag, Pb and Hg react at pH 10, to form colored complexes on the surface of the resin. Absorbance can be measured directly on the solid phase at 550 nm, to detect the presence or absence of these cations in a solution sample. Physical-chemical variables of the method were optimized in order to find suitable analytical conditions for the simultaneous determination of Cu, Cd and Zn by solid phase derivative spectrophotometry. Under the selected conditions the three analytes can be accurately determined between 1 and 100 ng·mL-1, with a detection limit (3s criterion) of 0.9, 0.5, and 0.4 ng·mL-1, for Cu, Cd and Zn, respectively. The repeatability, expressed as the relative standard deviation (RSD), was lower than 2 %. The percentage recoveries in the determination of Cu, Cd, and Zn in a quality control standard were between 98 and 103 %info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.49 n.2 20042004-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072004000200011en10.4067/S0717-97072004000200011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Simultaneous determination Screening transition metal ions solid phase derivative spectrophotometry
spellingShingle	Simultaneous determination Screening transition metal ions solid phase derivative spectrophotometry Tora,M. Inés Lara,Nelson Narváe,Jéssica Richte,Pablo SCREENING OF SOME TRANSITION METAL IONS AND QUANTITATIVE DETERMINATION OF COPPER, CADMIUM AND ZINC BY SOLID PHASE DERIVATIVE SPECTROPHOTOMETRY
description	A simple solid phase spectrophotometric method for both screening of eight transition metal ions plus lead and quantitative determination of copper, cadmium and zinc is described. The method is based on the preparation of a sensitive analytical zone by immobilization of the organic reagent 1-(2-pyridylazo)-2-naphthol (PAN) in a Dowex 50WX2-100 resin, in which Cd, Cu, Zn, Co, Fe, Ni, Ag, Pb and Hg react at pH 10, to form colored complexes on the surface of the resin. Absorbance can be measured directly on the solid phase at 550 nm, to detect the presence or absence of these cations in a solution sample. Physical-chemical variables of the method were optimized in order to find suitable analytical conditions for the simultaneous determination of Cu, Cd and Zn by solid phase derivative spectrophotometry. Under the selected conditions the three analytes can be accurately determined between 1 and 100 ng·mL-1, with a detection limit (3s criterion) of 0.9, 0.5, and 0.4 ng·mL-1, for Cu, Cd and Zn, respectively. The repeatability, expressed as the relative standard deviation (RSD), was lower than 2 %. The percentage recoveries in the determination of Cu, Cd, and Zn in a quality control standard were between 98 and 103 %
author	Tora,M. Inés Lara,Nelson Narváe,Jéssica Richte,Pablo
author_facet	Tora,M. Inés Lara,Nelson Narváe,Jéssica Richte,Pablo
author_sort	Tora,M. Inés
title	SCREENING OF SOME TRANSITION METAL IONS AND QUANTITATIVE DETERMINATION OF COPPER, CADMIUM AND ZINC BY SOLID PHASE DERIVATIVE SPECTROPHOTOMETRY
title_short	SCREENING OF SOME TRANSITION METAL IONS AND QUANTITATIVE DETERMINATION OF COPPER, CADMIUM AND ZINC BY SOLID PHASE DERIVATIVE SPECTROPHOTOMETRY
title_full	SCREENING OF SOME TRANSITION METAL IONS AND QUANTITATIVE DETERMINATION OF COPPER, CADMIUM AND ZINC BY SOLID PHASE DERIVATIVE SPECTROPHOTOMETRY
title_fullStr	SCREENING OF SOME TRANSITION METAL IONS AND QUANTITATIVE DETERMINATION OF COPPER, CADMIUM AND ZINC BY SOLID PHASE DERIVATIVE SPECTROPHOTOMETRY
title_full_unstemmed	SCREENING OF SOME TRANSITION METAL IONS AND QUANTITATIVE DETERMINATION OF COPPER, CADMIUM AND ZINC BY SOLID PHASE DERIVATIVE SPECTROPHOTOMETRY
title_sort	screening of some transition metal ions and quantitative determination of copper, cadmium and zinc by solid phase derivative spectrophotometry
publisher	Sociedad Chilena de Química
publishDate	2004
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072004000200011
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SCREENING OF SOME TRANSITION METAL IONS AND QUANTITATIVE DETERMINATION OF COPPER, CADMIUM AND ZINC BY SOLID PHASE DERIVATIVE SPECTROPHOTOMETRY

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