Critical evaluation of internal standardization in ICP tandem mass spectrometry and feasibility of the oxygen reaction for boron determination in plants

Autor(es)

Amaral, Clarice D. B. ^{[1, 2]} ; Machado, Raquel C. ^{[1, 2]} ; Virgilio, Alex ^[2] ; Schiavo, Daniela ^[3] ; Nogueira, Ana Rita A. ^{[1, 2]} ; Nobrega, Joaquim A. ^[2]

Afiliação do(s) autor(es)

^[1] Embrapa Pecuaria Sudeste, Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Chem, Grp Appl Instrumental Anal, POB 676, BR-13560970 Sao Carlos, SP - Brazil

^[3] Agilent Technol, Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Analytical Atomic Spectrometry; v. 31, n. 6, p. 1179-1184, JUN 2016.
• Citações Web of Science: 6

Resumo

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 (IS.) for B determination in plants by ICP-MS/MS using a single quadrupole mode and MS/MS mode with O-2 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 O-2. The coexistence of spectral and non-spectral interferences was evidenced by increasing carbon concentrations in samples and checking positive errors caused for B-11(+). 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. (AU)

• Processo FAPESP: 13/26672-5 - Desenvolvimento de procedimentos para a determinação de As, Ba, Cd, Cr, Pb e Si em amostras de fertilizantes minerais por espectrometria de emissão óptica com plasma induzido por micro-ondas (MIP OES)
• Beneficiário: Raquel Cardoso Machado
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/18393-1 - Avaliação da análise em fluxo por gradiente como estratégia de calibração para técnicas espectroanalíticas com fonte de plasma
• Beneficiário: Alex Virgilio
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 15/14488-0 - Desenvolvimento de métodos analíticos para a determinação da qualidade de fertilizantes e resíduos de curtumes
• Beneficiário: Ana Rita de Araujo Nogueira
• Modalidade de apoio: Auxílio à Pesquisa - Regular