title: Detection of the origin of Brazilian wines based on the determination of only four elements using high-resolution continuum source flame AAS.
abstract: A method has been developed to determine 10 elements in Brazilian red wines using high-resolution continuum source flame atomic absorption spectrometry, a technique that allows the fast sequential determination of an essentially unlimited number of elements per sample, each one under previously optimized conditions. All measurements were made without sample preparation, using aqueous standard solutions for calibration. The results were in agreement within 99% of confidence (t-test) with those obtained by inductively coupled plasma optical emission spectrometry. The same grape, Cabernet sauvignon, was used in all experiments, and the wines from each region were prepared especially for this investigation in order to avoid any confusion due to grapes from other regions, which are often used in commercial wines. The elements K, Mn, Rb and Sr were found to be the best indicators for the origin of the wines, based on a Principal Component Analysis.
authors.affiliation: Instituto de Química, Universidade Federal do Rio Grande do Sul, Porto Alegre-RS, Brazil.
authors.forename: Wiliam
authors.initials: W
authors.lastname: Boschetti
authors.forename: Roger T
authors.initials: RT
authors.lastname: Rampazzo
authors.forename: Morgana B
authors.initials: MB
authors.lastname: Dessuy
authors.forename: Maria Goreti R
authors.initials: MG
authors.lastname: Vale
authors.forename: Alessandro
authors.initials: A
authors.lastname: de Oliveira Rios
authors.forename: Plinho
authors.initials: P
authors.lastname: Hertz
authors.forename: Vitor
authors.initials: V
authors.lastname: Manfroi
authors.forename: Paulo G
authors.initials: PG
authors.lastname: Celso
authors.forename: Marco F
authors.initials: MF
authors.lastname: Ferrão
mesh_terms: D001938:Brazil; D005843:Geography; D008345:Manganese / Q000032:analysis*; D011188:Potassium / Q000032:analysis*; D025341:Principal Component Analysis; D012413:Rubidium / Q000032:analysis*; D013045:Species Specificity; D013054:Spectrophotometry, Atomic / Q000295:instrumentation / Q000379:methods*; D013324:Strontium / Q000032:analysis*; D027843:Vitis / Q000737:chemistry / Q000145:classification; D014920:Wine / Q000032:analysis*
chemical_list: D008345:Manganese; D012413:Rubidium; D011188:Potassium; D013324:Strontium