Title:	Alternative approaches applied to inductively coupled plasma techniques: multi-flow and two-flow calibration.
Authors:	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.
Affiliation:	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.
Date Issued:	2021
Citation:	Journal of the Brazilian Chemical Society, v.32, n.4, 2021.
Pages:	p.842-851.
Description:	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.
Keywords:	Nebulization gas Calibration strategy Matrix effects ICP OES ICP-MS
ISSN:	0103-5053
DOI:	https://dx.doi.org/10.21577/0103-5053.20200235
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CPPSE)