title: Lanthanides determination in red wine using ultrasound assisted extraction, flow injection, aerosol desolvation and ICP-MS.
abstract: This paper deals with the determination of the fourteen naturally occurring elements of the lanthanide series in red wine. Ultrasound (US) was used for sample preparation prior lanthanides determination using ICP-MS. Flow injection (FI) and pneumatic nebulization/aerosol desolvation were used for nebulization of aliquots of 50 μL of sample and its subsequent transportation to plasma. Sample preparation procedures, matrix interference and time of sonication were evaluated. Better results for lanthanides in red wine were obtained by sonication with US probe for 90 s and sample 10-fold diluted. The limits of detection of La, Ce, Nd, Sm, Gd, Pr, Eu, Tb, Dy, Ho, Er, Tm, Lu and Yb were 6.57, 10.8, 9.97, 9.38, 2.71, 1.29, 1.22, 0.52, 2.35, 0.96, 2.30, 0.45, 0.24 and 1.35 ng L(-1), respectively. Red wines of different varieties from three countries of South America were discriminated according to the country of origin by means of multivariate analysis of lanthanides concentration.
authors: Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
authors: Fabrina R S
authors: FR
authors: Bentlin
authors: Clarissa M M
authors: CM
authors: dos Santos
authors: Erico M M
authors: EM
authors: Flores
authors: Dirce
authors: D
authors: Pozebon
mesh_terms: D000336:Aerosols / Q000737:chemistry*; D016000:Cluster Analysis; D016002:Discriminant Analysis; D017022:Flow Injection Analysis; D028581:Lanthanoid Series Elements / Q000032:analysis* / Q000302:isolation & purification; D013058:Mass Spectrometry; D013010:Sonication; D014920:Wine / Q000032:analysis*
chemical_list: D000336:Aerosols; D028581:Lanthanoid Series Elements