Determination Of Mercury In Gasoline Diluted In Ethanol By Gf Aas After Cold Vapor Generation, Pre-concentration In Gold Column And Trapping On Graphite Tube

dc.creatorTorres D.P.
dc.creatorDittert I.M.
dc.creatorHohn H.
dc.creatorFrescura V.L.A.
dc.creatorCurtius A.J.
dc.date2010
dc.date2015-06-26T12:40:54Z
dc.date2015-11-26T15:24:26Z
dc.date2015-06-26T12:40:54Z
dc.date2015-11-26T15:24:26Z
dc.date.accessioned2018-03-28T22:33:21Z
dc.date.available2018-03-28T22:33:21Z
dc.identifier
dc.identifierMicrochemical Journal. , v. 96, n. 1, p. 32 - 36, 2010.
dc.identifier0026265X
dc.identifier10.1016/j.microc.2010.01.011
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-77955553548&partnerID=40&md5=28b198bc11d3112498920cd84bec32de
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/91379
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/91379
dc.identifier2-s2.0-77955553548
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1260696
dc.descriptionA simple method for the determination of mercury in gasoline samples diluted with ethanol by graphite furnace atomic absorption spectrometry (GF AAS) after cold vapor (CV) generation, pre-concentration in a gold column and trapping on a graphite tube is proposed. The methodology is based upon conventional analytical processes that can be performed by any laboratory with a chemical generation and gold amalgamation systems coupled to the atomic absorption spectrometer. The GF AAS temperature was optimized, being the retention, pyrolysis and atomization temperatures, respectively, 100°C, 150°C and 800°C. Gasoline samples were prepared simply by forming a 2-fold diluted solution in ethanol. The mercury formed vapors by reacting the sample with the reducing agent were pre-concentrated in a gold column and further retained on a graphite tube, coated with gold as permanent modifier. Five samples from different gas stations around the UFSC Campus (Florianópolis, Brazil) were analyzed and the Hg concentrations were found to be in the range from 0.40μgL-1 to 0.90μgL-1. Calibration against aqueous standard solutions in acidic medium was carried out. The standard solutions had about the same viscosity as the gasoline diluted in ethanol. The relative standard deviations were lower than 2.4% for the samples. The limits of detection in the samples were 0.08 and 0.14μgL-1, with and without pre-concentration in the gold column, respectively. The accuracy of the method was estimated by applying the recovery test and recovery values between 92 and 100% were obtained. A sample throughput of 4h-1 was achieved. Simplicity and high detection capability are some of the qualities of the method. © 2010 Elsevier B.V.
dc.description96
dc.description1
dc.description32
dc.description36
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dc.languageen
dc.publisher
dc.relationMicrochemical Journal
dc.rightsfechado
dc.sourceScopus
dc.titleDetermination Of Mercury In Gasoline Diluted In Ethanol By Gf Aas After Cold Vapor Generation, Pre-concentration In Gold Column And Trapping On Graphite Tube
dc.typeArtículos de revistas


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