Automatic determination of mercury in samples of environmental interest

dc.creatorCanela, MC
dc.creatorJardim, WF
dc.creatorRohwedder, JJR
dc.date1996
dc.dateNOV-DEC
dc.date2014-12-16T11:33:46Z
dc.date2015-11-26T17:55:55Z
dc.date2014-12-16T11:33:46Z
dc.date2015-11-26T17:55:55Z
dc.date.accessioned2018-03-29T00:39:36Z
dc.date.available2018-03-29T00:39:36Z
dc.identifierJournal Of Automatic Chemistry. Taylor & Francis Ltd, v. 18, n. 6, n. 193, n. 198, 1996.
dc.identifier0142-0453
dc.identifierWOS:A1996WB58200001
dc.identifier10.1155/S1463924696000235
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/55212
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/55212
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/55212
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1291133
dc.descriptionAn automatic flow injection (FI) system for the determination of mercury was developed using a commercial Gold vapour atomic absorption spectrophotometer (CVAAS). Control and data acquisition in the FI system was done with an IBM-PC 286 XI compatible microcomputer and a home-made interface, using software written in QuickBasic 4.5. Mercury content was determined by: sampling using a combination of four electromechanical three-way poly(tetrafluoroethylene) valves; separation of the dissolved reduced mercury in a gas/liquid separation cell using nitrogen as carrier, followed by amalgamation of the stripped metal on a gold wire column; after stripping the metal, cleaning the separation cell using vacuum, which was controlled by a three-way electromechanical valve; heating the gold wire column automatically to release the amalgamated mercury using an external nichrome wire coil; storing the output signals automatically to calculate the final mercury concentration, using commercially available software. The optimized system presents a detection limit of 5.3 ng l(-1) of mercury (30 pg absolute) using 5.7 ml (three injections of 1900 mu l of the sample) with an analytical frequency of six samples per hour and reproducibility of 5%. The procedure was used to determine mercury in fish, hair and natural water samples.
dc.description18
dc.description6
dc.description193
dc.description198
dc.languageen
dc.publisherTaylor & Francis Ltd
dc.publisherLondon
dc.publisherInglaterra
dc.relationJournal Of Automatic Chemistry
dc.relationJ. Autom. Chem.
dc.rightsfechado
dc.rightshttp://journalauthors.tandf.co.uk/permissions/reusingOwnWork.asp
dc.sourceWeb of Science
dc.subjectAtomic Fluorescence Spectrometry
dc.subjectFlow-injection Analysis
dc.subjectGold Amalgamation
dc.subjectSub-nanogram
dc.subjectLiter Levels
dc.subjectVapor
dc.subjectAnalyzer
dc.subjectWaters
dc.titleAutomatic determination of mercury in samples of environmental interest
dc.typeArtículos de revistas


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