PMID: 15228119Jul 2, 2004Paper

A sensitive method for cadmium determination using an on-line polyurethane foam preconcentration system and thermospray flame furnace atomic absorption spectrometry

Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry
Cesar Ricardo Teixeira Tarley, Marco Aurélio Zezzi Arruda

Abstract

A new sensitive and low cost method for cadmium determination at microg l(-1) levels that combines an on-line preconcentration system with the thermospray flame furnace atomic absorption spectrometry technique (TS-FF-AAS) is described in this work. Cadmium is preconcentrated from an acidic medium (pH 2.0) by forming a complex with ammonium O,O-diethyldithiophosphate (DDTP), which is then adsorbed onto polyurethane foam (PUF). The elution step is performed by using 80% (v/v) ethanol. The effects of the chemical and flow variables associated with the preconcentration were studied, such as the pH of formation of the Cd-DDTP complex, the DDTP concentration, the preconcentration and elution flow rate and the mass of adsorbent. The present method was operated in volume-mode (2 ml) and provided a linear range from 0.4 to 15.0 microg l(-1) with a sample throughput of 16 h(-1). The increase of power detection related to TS-FF-AAS by coupling the preconcentration system was confirmed by the enhancement of sensitivity (ca. 5 times), when compared to the value for TS-FF-AAS alone, thus achieving a low detection limit (0.12 microg l(-1)). The accuracy of the method was confirmed from analyses of spiked water samples and by the use of a refe...Continue Reading

Citations

Dec 2, 2005·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·César Ricardo Teixeira TarleyGeraldo Domingues Matos
Sep 13, 2006·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Dongmei WuLiping Guo
Aug 3, 2007·Journal of Automated Methods & Management in Chemistry·Eduardo Costa de FigueiredoPedro Orival Luccas
May 15, 2007·Water Research·Krystyna Pyrzynska, Krzysztof Kilian
Feb 14, 2017·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Yusuke ToyaKazuaki Wagatsuma
May 12, 2015·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Sami M Abdel AzeemM F El-Shahat

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