Analysis of powdered coffee and milk by ICPOES after sample treatment with tetramethylammonium hydroxide

dc.creatorRibeiro, AS
dc.creatorMoretto, AL
dc.creatorArruda, MAZ
dc.creatorCadore, S
dc.date2003
dc.dateMAR
dc.date2014-11-15T21:54:06Z
dc.date2015-11-26T17:22:08Z
dc.date2014-11-15T21:54:06Z
dc.date2015-11-26T17:22:08Z
dc.date.accessioned2018-03-29T00:09:37Z
dc.date.available2018-03-29T00:09:37Z
dc.identifierMicrochimica Acta. Springer-verlag Wien, v. 141, n. 41732, n. 149, n. 155, 2003.
dc.identifier1436-5073
dc.identifierWOS:000182093900006
dc.identifier10.1007/s00604-002-0935-3
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/54591
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/54591
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/54591
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1283537
dc.descriptionA simple method for the solubilization of powdered milk and soluble coffee using tetramethylammonium hydroxide (TMAH) is proposed. While 500 muL of the reagent was used for the solubilization of 350 mg of coffee samples, milk samples required 1000 muL of TMAH. Solubilization at 80degreesC takes place within 10, 20 and 30 min for soluble coffee, whole and skim powdered milk, respectively. Subsequently, the volume was topped up to 25 mL with deionized water. Thereafter, the concentrations of Ca, Cu, Fe, K, Mg, Mn, Na, P, Se, Sn and Zn were determined by inductively coupled plasma optical emission spectrometry (ICP OES). When applied to standard reference material and to commercial samples the proposed method showed good results, and it was also compared with two other preparation methods. Limits of detection calculated for Ca, Cu, Fe, K, Mg, Mn, Na, P, Se, Sri and Zn were 2.1, 0.065, 0.11, 103, 0.08 8, 0.011, 1.5, 2. 1, 1.1, 0.66 and 0.11 mug g(-1) respectively. The RSD values were less than 10% for the certified reference materials (IAEAA-11 and BCR 63R). Statistical tests showed that the results for the metal concentrations do not vary significantly with the different methods or with the certified reference values, considering a confidence limit of 95%.
dc.description141
dc.description41732
dc.description149
dc.description155
dc.languageen
dc.publisherSpringer-verlag Wien
dc.publisherVienna
dc.publisherAustria
dc.relationMicrochimica Acta
dc.relationMicrochim. Acta
dc.rightsfechado
dc.rightshttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dc.sourceWeb of Science
dc.subjectinductively coupled plasma optical emission spectrometry
dc.subjecttetramethylammonium hydroxide
dc.subjectsoluble coffee
dc.subjectpowdered milk
dc.subjectslurry
dc.subjectPlasma-mass Spectrometry
dc.subjectAtomic-absorption Spectrometry
dc.subjectBiological-materials
dc.subjectFood Samples
dc.subjectElements
dc.subjectIodine
dc.subjectMs
dc.subjectDissolution
dc.subjectExtraction
dc.subjectDigestion
dc.titleAnalysis of powdered coffee and milk by ICPOES after sample treatment with tetramethylammonium hydroxide
dc.typeArtículos de revistas


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