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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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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]
Total Authors: 7
[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
Total Affiliations: 5
Document type: Journal article
Source: Talanta; v. 233, OCT 1 2021.
Web of Science Citations: 0

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)

FAPESP's process: 19/22113-8 - Natural Deep Eutectic Solvents: synthesis, characterization, and application for the determination of As, Cd, Cr, Hg, Se, and V in environmental samples using ICP-MS
Grantee:Mario Henrique Gonzalez
Support type: Regular Research Grants
FAPESP's process: 18/26145-9 - Bioavailability, bioaccessibility, and speciation of nutrients and inorganic contaminants in meat and fish
Grantee:Ana Rita de Araujo Nogueira
Support type: Regular Research Grants