Self-organizing map applied to the choice of internal standards for the determination of Cd, Pb, Sn, and platinum group elements by inductively coupled plasma mass spectrometry

Autor(es)

Moreira, Luana S. ^[1] ; Costa, Floriatan S. ^[1] ; Machado, Raquel C. ^[2] ; Nogueira, Ana Rita A. ^{[2, 3]} ; Gonzalez, Mario H. ^[4] ; da Silva, Erik G. P. ^[5] ; Amaral, Clarice D. B. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Parana, Dept Chem, BR-81531980 Curitiba, Parana - Brazil

^[2] Univ Fed Sao Carlos, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil

^[3] Embrapa Pecuaria Sudeste, BR-13560970 Sao Carlos, SP - Brazil

^[4] Sao Paulo State Univ, Natl Inst Alternat Technol Detect, Dept Chem & Environm Sci, Toxicol Evaluat & Removal Micropollutants & Radio, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil

^[5] Univ Estadual Santa Cruz, Dept Exact & Technol Sci, BR-45662900 Ilheus, BA - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Talanta; v. 233, OCT 1 2021.
• Citações Web of Science: 0

Resumo

The behaviors of internal standards, according to different flow rates of the cell collision gas (He), were studied for the determination of Cd, Pb, Pd, Pt, Rh, and Sn in samples of fish and mollusks by inductively coupled plasma mass spectrometry (ICP-MS). The elements Bi, Ge, In, Sc, and Y were selected as internal standards, considering their masses and first ionization energies. Addition and recovery experiments were carried out at three concentration levels to evaluate the accuracy of the method applied for the analysis of two samples with different matrices. The results were evaluated using a self-organizing map (SOM). The best analyte/IS pairs were as follows: Cd-114(+)/Ge-74(+), Pt-195(+)/Ge-74(+), and Pb-208(+)/Ge-74(+). For Rh-103(+), Pd-106(+), and Sn-120(+), greater accuracy was achieved without use of an internal standard. Helium gas (2.8 mL min(-1)) was used in the collision cell for the analytes, except for Sn, and recoveries ranged from 98 to 101% under optimal conditions. The use of SOM as an exploratory analysis tool was an effective approach for selection of the most appropriate internal standards. (AU)

• Processo FAPESP: 19/22113-8 - Solventes eutéticos naturais: síntese, caracterização e aplicações na determinação de As, Cd, Cr, Hg, Se e V em amostras ambientais por ICP-MS
• Beneficiário: Mario Henrique Gonzalez
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/26145-9 - Biodisponibilidade, bioacessibilidade e especiação de nutrientes e contaminantes inorgânicos em carnes e pescados
• Beneficiário: Ana Rita de Araujo Nogueira
• Modalidade de apoio: Auxílio à Pesquisa - Regular