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

dc.creatorTarley, CRT
dc.creatorArruda, MAZ
dc.date2004
dc.dateJUN
dc.date2014-11-17T06:48:38Z
dc.date2015-11-26T16:59:41Z
dc.date2014-11-17T06:48:38Z
dc.date2015-11-26T16:59:41Z
dc.date.accessioned2018-03-28T23:47:23Z
dc.date.available2018-03-28T23:47:23Z
dc.identifierAnalytical Sciences. Japan Soc Analytical Chemistry, v. 20, n. 6, n. 961, n. 966, 2004.
dc.identifier0910-6340
dc.identifierWOS:000222128600015
dc.identifier10.2116/analsci.20.961
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/53743
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/53743
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/53743
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1278262
dc.descriptionA new sensitive and low cost method for cadmium determination at mug 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 mug 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 mug l(-1)). The accuracy of the method was confirmed from analyses of spiked water samples and by the use of a reference technique (ETAAS). Certified biological materials were also used for the same purpose.
dc.description20
dc.description6
dc.description961
dc.description966
dc.languageen
dc.publisherJapan Soc Analytical Chemistry
dc.publisherTokyo
dc.publisherJapão
dc.relationAnalytical Sciences
dc.relationAnal. Sci.
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectInjection Sorbent Extraction
dc.subjectTs-ff-aas
dc.subjectChelating Agent
dc.subjectWater Samples
dc.subjectEnvironmental-samples
dc.subjectBiological Samples
dc.subjectLead Determination
dc.subjectCopper
dc.subjectDialkyldithiophosphates
dc.subjectColumn
dc.titleA sensitive method for cadmium determination using an on-line polyurethane foam preconcentration system and thermospray flame furnace atomic absorption spectrometry
dc.typeArtículos de revistas


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