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

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 se...

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Published inTalanta (Oxford) Vol. 233; p. 122534
Main Authors Moreira, Luana S., Costa, Floriatan S., Machado, Raquel C., Nogueira, Ana Rita A., Gonzalez, Mario H., da Silva, Erik G.P., Amaral, Clarice D.B.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.2021
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Abstract 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: 114Cd+/74Ge+, 195Pt+/74Ge+, and 208Pb+/74Ge+. For 103Rh+, 106Pd+, and 120Sn+, 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. [Display omitted] •A new approach with the first use of a Self-organizing map (SOM).•Interferences in the determination of elements that are hard to ionize in ICP-MS.•Use of internal standards and the collision/reaction cell to overcome interferences.•Exploratory analysis strategy applied for studies of internal standardization.
AbstractList 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: 114Cd+/74Ge+, 195Pt+/74Ge+, and 208Pb+/74Ge+. For 103Rh+, 106Pd+, and 120Sn+, 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. [Display omitted] •A new approach with the first use of a Self-organizing map (SOM).•Interferences in the determination of elements that are hard to ionize in ICP-MS.•Use of internal standards and the collision/reaction cell to overcome interferences.•Exploratory analysis strategy applied for studies of internal standardization.
ArticleNumber 122534
Author Machado, Raquel C.
Costa, Floriatan S.
Nogueira, Ana Rita A.
Moreira, Luana S.
da Silva, Erik G.P.
Amaral, Clarice D.B.
Gonzalez, Mario H.
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  givenname: Clarice D.B.
  surname: Amaral
  fullname: Amaral, Clarice D.B.
  email: clariceamaral@ufpr.br
  organization: Department of Chemistry, Federal University of Paraná, Curitiba, PR, 81531-980, Brazil
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Keywords PGEs
Fish
Bivalve mollusks
ICP-MS
Self-organizing map
Toxic elements
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Snippet 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,...
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SubjectTerms Bivalve mollusks
Fish
ICP-MS
PGEs
Self-organizing map
Toxic elements
Title 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
URI https://dx.doi.org/10.1016/j.talanta.2021.122534
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