Data/hora: 07/06/2024 11:30:12

Biblioteca(s): | Embrapa Pecuária Sudeste.
Data corrente: | 06/07/2021
Data da última atualização: | 28/09/2021
Autoria: | MACHADO, R. C.; SILVA, A. B. S. da; ANDRADE, D. F. de; PINHEIRO, F. C.; WILLIAMS, C. B.; DONATI, G. L.; NOGUEIRA, A. R. de A.; PEREIRA FILHO, E. R.
Afiliação: | RAQUEL CARDOSO MACHADO, UFSCAR; ANA BEATRIZ SANTOS DA SILVA, UFSCAR; DANIEL FERNANDES DE ANDRADE, UFSCAR; FERNANDA COSTA PINHEIRO, UFSCAR; CHARLES B. WILLIAMS, Davidson College; GEORGE LUIS DONATI, Wake Forest University; ANA RITA DE ARAUJO NOGUEIRA, CPPSE; EDENIR RODRIGUES PEREIRA FILHO, UFSCAR.
Título: | Alternative approaches applied to inductively coupled plasma techniques: multi-flow and two-flow calibration.
Ano de publicação: | 2021
Fonte/Imprenta: | Journal of the Brazilian Chemical Society, v.32, n.4, 2021.
Páginas: | p.842-851.
ISSN: | 0103-5053
DOI: | https://dx.doi.org/10.21577/0103-5053.20200235
Idioma: | Inglês
Conteúdo: | Multi-flow calibration (MFC) is based on monitoring the analytical signal from a single calibration standard solution at several different nebulization gas flow rates (Q), which normalizes plasma conditions and minimizes matrix effects. In the present study, MFC was evaluated, for the first time, applied to inductively coupled plasma optical emission spectrometry (ICP OES) and inductively coupled plasma mass spectrometry (ICP-MS) to analyze different and complexmatrix samples. Al, As, Cd, Cr, Cu, Mn, Pb, and Zn were determined by ICP OES, while As, Cd, Co, Cu, Hg, Mo, Mn, Ni, Se, Sb, Pb, and V were determined by ICP-MS. MFC results were compared with those obtained using external standard calibration (EC) for both techniques and in all cases, MFC showed equal or superior accuracy (recoveries between 80-120%) compared to EC, and lower relative standard deviation (RSDs < 10%). Several tests were also performed using only two nebulization gas flows to build linear models for calibration (called two-flow calibration, TFC) and the accurate results (recoveries ranged from 80 to 110% for ICP OES and from 81 to 102% for ICP-MS) suggests that this strategy can be also applied, resulting in a method with high sample throughput.
Palavras-Chave: | Calibration strategy; ICP OES; ICP-MS; Matrix effects; Nebulization gas.
Categoria do assunto: | W Química e Física
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/224314/1/Alternative-Approaches-Applied.pdf
Registro original: | Embrapa Pecuária Sudeste (CPPSE)
Exemplares: | CPPSE - (25354-1) - UPC - AP - DD - PROCI-2021.00085 - MAC - 2021.00093 - DIS