Data/hora: 22/06/2024 03:53:32

Biblioteca(s): | Embrapa Pecuária Sudeste.
Data corrente: | 21/06/2016
Data da última atualização: | 08/03/2017
Autoria: | AMARAL, C. D. B. do; MACHADO, R. C.; VIRGILIO, A.; SCHIAVO, D.; NOGUEIRA, A. R. de A.; NOBREGA, J. de A.
Afiliação: | Clarice Dias Britto do Amaral, UFSCar; Raquel Cardoso Machado, UFSCar; Alex Virgilio, UFSCar; Daniela Schiavo, Agilent Technologies; ANA RITA DE ARAUJO NOGUEIRA, CPPSE; Joaquim de Araújo Nóbrega, UFSCar.
Título: | Critical evaluation of internal standardization in ICP tandem mass spectrometry and feasibility of the oxygen reaction for boron determination in plants.
Ano de publicação: | 2016
Fonte/Imprenta: | In: Journal of Analytical Atomic Spectrometry, v.31, issue 6, p. 1179-1184, 2016
ISSN: | 1364-5544
DOI: | 10.1039/c6ja00133e
Idioma: | Inglês
Conteúdo: | The feasibility of internal standardization and the oxygen reaction in ICP-MS was studied for accurate determination of boron. Lithium, Be and Rh were systematically evaluated as internal standards (I.S.) for B determination in plants by ICP-MS/MS using a single quadrupole mode and MS/MS mode with O2 into a cell, where B and internal standard signal intensities were processed either after both or only one of them reacted. Carbon is a source of spectral and matrix interferences in B determination by ICP-MS. The use of instrumental strategies such as tandem mass spectrometry (MS/MS) concomitantly with internal standardization demands further investigation about the I.S. behaviour regarding the gas phase reaction with oxygen. The behaviours of B and Be, as well as their oxides, were quite similar in an octopole reaction system containing O2. The coexistence of spectral and non-spectral interferences was evidenced by increasing carbon concentrations in samples and checking positive errors caused for 11B+. Recoveries for B determination in plant certified reference materials without I.S. ranged from 98 to 145% and with Be as an internal standard ranged from 98 to 108%. Beryllium presented favourable characteristics as an internal standard for B due to its mass closeness, similar ionization energy, and reactivity with oxygen.
Palavras-Chave: | ICP; Plants; Spectometry.
Thesaurus Nal: | boron.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Pecuária Sudeste (CPPSE)
Exemplares: | CPPSE - (23548-1) - UPC - AP - DD - PROCI-2016.00011 - AMA - 2016.00015 - DIS