Data/hora: 22/09/2024 23:41:22

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