Simple mercury fractionation in biological samples by CV AAS following microwave-assisted acid digestion or TMAH pre-treatment

dc.creatorTorres, DP
dc.creatorFrescura, VLA
dc.creatorCurtius, AJ
dc.date2009
dc.dateNOV
dc.date2014-11-18T19:54:33Z
dc.date2015-11-26T16:58:26Z
dc.date2014-11-18T19:54:33Z
dc.date2015-11-26T16:58:26Z
dc.date.accessioned2018-03-28T23:46:02Z
dc.date.available2018-03-28T23:46:02Z
dc.identifierMicrochemical Journal. Elsevier Science Bv, v. 93, n. 2, n. 206, n. 210, 2009.
dc.identifier0026-265X
dc.identifierWOS:000271847100015
dc.identifier10.1016/j.microc.2009.07.003
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/74140
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/74140
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/74140
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1277921
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionA simple and reliable method to determine total and inorganic mercury in biological certified reference material (CRM) by cold vapor atomic absorption spectrometry (CV AAS) is proposed. After the CRM treatment at room temperature with tetramethylammonium hydroxide (TMAH), inorganic mercury is determined by CV AAS. Total mercury is measured by the same technique, after sample acid digestion in a microwave oven. Organic mercury, basically methylmercury, is obtained by difference. In both procedures, the quartz tube is kept at room temperature. By means of analysis of the following reference materials: pig kidney, lobster hepatopancreas. dogfish liver and mussel tissue, it was clear that the difference between the total and inorganic mercury concentrations agrees with the methylmercury concentration. Only one calibration curve against aqueous standards in acidic medium was carried out for both procedures. The concentrations obtained by both procedures are in agreement with the certified values according to the t-test at a 95% confidence level. The relative standard deviations were lower than 3.0% for digested CRM and 6.0% for CRM treated with TMAH for most of the samples. The limits of detection in the samples were 0.02 mu g g(-1) and 0.04 mu g g(-1) for inorganic and total Hg, respectively, since the sample mass for total mercury was half of that for inorganic mercury determination. Simplicity and high efficiency without using chromatographic techniques are some of the qualities of the proposed method, being adequate for fractionation analysis of mercury in biological samples. (C) 2009 Elsevier B.V. All rights reserved.
dc.description93
dc.description2
dc.description206
dc.description210
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageen
dc.publisherElsevier Science Bv
dc.publisherAmsterdam
dc.publisherHolanda
dc.relationMicrochemical Journal
dc.relationMicrochem J.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectTMAH treatment
dc.subjectMicrowave-assisted digestion
dc.subjectBiological samples
dc.subjectCV AAS
dc.subjectMercury fractionation
dc.subjectAtomic-absorption-spectrometry
dc.subjectTetramethylammonium Hydroxide
dc.subjectVapor Generation
dc.subjectDifferent Temperatures
dc.subjectEmission-spectrometry
dc.subjectHydride Generation
dc.subjectInorganic Mercury
dc.subjectTissues
dc.subjectMethylmercury
dc.subjectSpeciation
dc.titleSimple mercury fractionation in biological samples by CV AAS following microwave-assisted acid digestion or TMAH pre-treatment
dc.typeArtículos de revistas


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