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On-line mechanised microwave biological fluid decomposition and off-line calcium and magnesium determinations by flame atomic absorption spectrometry

dc.creatorCoelho, LM
dc.creatorPereira, ER
dc.creatorArruda, MAZ
dc.date2002
dc.date2014-07-30T18:02:42Z
dc.date2015-11-26T16:52:30Z
dc.date2014-07-30T18:02:42Z
dc.date2015-11-26T16:52:30Z
dc.date.accessioned2018-03-28T23:39:27Z
dc.date.available2018-03-28T23:39:27Z
dc.identifierQuimica Analitica. Elsevier Informacion Professional, S A, v. 20, n. 4, n. 243, n. 249, 2002.
dc.identifier0212-0569
dc.identifierWOS:000175922100012
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/69453
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/69453
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1276299
dc.descriptionThe coupling of a flow system to a household microwave oven is proposed for on-line urine sample decomposition with posterior off-line Ca and Mg determination by flame atomic absorption spectrometry (FA-AS). The variables investigated in the optimisation of the decomposition process were: HNO3 concentration (0 - 2.0 mol L-1), sample injection volume (150 - 400 mul), microwave power (0 - 6 min) and microwave actuation time (0 - 6 min). Based on the sample volume injected into the flow system and the power effect, the best results achieved for Ca and Mg were 200 mul for injected sample volume, maximum microwave power (659 W) and 1 min of microwave actuation. The use of 1 mol L-1 HNO3 concentration was efficient, being a less drastic condition for decomposition process, minimising the environment contamination and the use of nitric acid. The proposed method presented an acceptable precision for calcium (expressed as RSD) of 1% (n = 12) for repeatability and 11% (n = 10) for reproducibility. For magnesium, the precision was 3% (n = 12) and 11% (n = 1), for repeatability and reproducibility, respectively.
dc.description20
dc.description4
dc.description243
dc.description249
dc.languageen
dc.publisherElsevier Informacion Professional, S A
dc.publisherBarcelona
dc.publisherEspanha
dc.relationQuimica Analitica
dc.relationQuim. Anal.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjecturine
dc.subjecton-line microwave assisted decomposition
dc.subjectcalcium
dc.subjectmagnesium
dc.subjectAssisted Sample Preparation
dc.subjectSpectrophotometric Determination
dc.subjectTrace-elements
dc.subjectFlow Systems
dc.subjectIcp-ms
dc.subjectDigestion
dc.subjectInjection
dc.subjectUrine
dc.subjectOven
dc.subjectPretreatment
dc.titleOn-line mechanised microwave biological fluid decomposition and off-line calcium and magnesium determinations by flame atomic absorption spectrometry
dc.typeArtículos de revistas


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