Performance evaluation of collision-reaction interface and internal standardization in quadrupole ICP-MS measurements

Autor(es)

Salazar, Rodrigo F. S. ^[1] ; Guerra, Marcelo B. B. ^[1] ; Pereira-Filho, Edenir R. ^[1] ; Nobrega, Joaquim A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Chem, Grp Appl Instrumental Anal, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Talanta; v. 86, p. 241-247, OCT 30 2011.
• Citações Web of Science: 16

Resumo

The combined use of internal standardization with collision and reaction interface in an inductively coupled plasma quadrupole mass spectrometer (ICP-QMS-CRI) was evaluated. The behavior of several elements (Ba, Cd, Co, Cr, Cu, Li, Mn, Mo, Pb, Sb, V and Zn) was studied by introducing H(2) or He through the skimmer and sampler cones of the CRI device and by using In. Rh and Sc as internal standards. Certified reference material of trace elements in water (NIST 1643e) was used to evaluate the performance of the method. A vinegar sample and mixed food diet standard reference material were directly introduced into the equipment as complex matrices for Cr and V determinations. Improvements in accuracy and precision were attained combining both strategies. The introduction of H(2) through the skimmer cone was the best way to overcome polyatomic ions formation and to improve SBR and BEC values for several elements. The use of Sc as internal standard improved the performance of ICP-QMS-CRI. (C) 2011 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 06/59083-9 - Espectrometria de massa acoplada ao plasma induzido: aspectos fundamentais e aplicações
• Beneficiário: Joaquim de Araújo Nóbrega
• Linha de fomento: Auxílio à Pesquisa - Temático
• Processo FAPESP: 08/08260-3 - Análises químicas de amostras ambientais da Antártica: determinação espectrométrica de Cd, Cr, Ni e Pb, uso de micro-fluorescência de Raios-X com radiação síncrotron e aplicações de ferramentas quimiométricas
• Beneficiário: Marcelo Braga Bueno Guerra
• Linha de fomento: Bolsas no Brasil - Doutorado Direto