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High-sensitivity tracing of stable isotope labeled Ag nanoparticles in environmental samples using MC-ICP-MS.

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Title: High-sensitivity tracing of stable isotope labeled Ag nanoparticles in environmental samples using MC-ICP-MS.
Authors: Junk, Tabea1 (AUTHOR), Rehkämper, Mark1 (AUTHOR) markrehk@imperial.ac.uk, Laycock, Adam1 (AUTHOR)
Source: JAAS (Journal of Analytical Atomic Spectrometry). Jun2019, Vol. 34 Issue 6, p1173-1183. 11p.
Subjects: Stable isotopes, Environmental sampling, Radiolabeling, Silver nanoparticles, Nanoparticles, Eco-labeling, Labels
Abstract: Silver nanoparticles (Ag NPs) are among the most widely used engineered nanomaterials and this warrants further investigation of their behaviour and fate in the environment. To support such work, we developed new techniques for efficient tracing of Ag NPs that are produced from, and hence labelled with, enriched 109Ag (Ag-En). The methods encompass a one-step anion exchange separation of Ag from the sample matrix and precise determination of 109Ag/107Ag ratios and 109Ag abundances by multiple-collector ICP-MS. The sample preparation procedure has an Ag yield of 104 ± 13% (1 SD) and a procedural Ag blank of less than 7 pg, enabling analysis of samples with only trace Ag contents. Analyses of Ag solutions and realistic samples show that careful correction of memory effects is paramount for ensuring data quality. Using appropriate procedures, the 109Ag/107Ag ratios of samples containing Ag-En can be determined to a precision and trueness of better than about 0.5%, when more than 0.5 ng Ag are available for analysis. Even if Ag is only present at 50 pg or less, the Ag isotope ratios and Ag-En concentrations of samples can be measured to better than 5 to 10%. The methods are therefore able to resolve the presence of 1 pg of Ag-En in samples that contain as little as 10 pg and to up to 1 ng of natural Ag. As such, the techniques allow robust detection and quantification of Ag-En in environmental samples even when highly variable quantities of Ag-En and natural Ag are present. The new methodology thus enables the use of stable isotope tracing to investigate the fate of Ag NPs in complex environmental systems at dosing concentrations similar to the predicted environmental concentrations and for very small samples, whilst also providing high sample throughput. [ABSTRACT FROM AUTHOR]
Copyright of JAAS (Journal of Analytical Atomic Spectrometry) is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: High-sensitivity tracing of stable isotope labeled Ag nanoparticles in environmental samples using MC-ICP-MS.
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  Data: <searchLink fieldCode="AR" term="%22Junk%2C+Tabea%22">Junk, Tabea</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rehkämper%2C+Mark%22">Rehkämper, Mark</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> markrehk@imperial.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Laycock%2C+Adam%22">Laycock, Adam</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="DE" term="%22Stable+isotopes%22">Stable isotopes</searchLink><br /><searchLink fieldCode="DE" term="%22Environmental+sampling%22">Environmental sampling</searchLink><br /><searchLink fieldCode="DE" term="%22Radiolabeling%22">Radiolabeling</searchLink><br /><searchLink fieldCode="DE" term="%22Silver+nanoparticles%22">Silver nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Nanoparticles%22">Nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Eco-labeling%22">Eco-labeling</searchLink><br /><searchLink fieldCode="DE" term="%22Labels%22">Labels</searchLink>
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  Label: Abstract
  Group: Ab
  Data: Silver nanoparticles (Ag NPs) are among the most widely used engineered nanomaterials and this warrants further investigation of their behaviour and fate in the environment. To support such work, we developed new techniques for efficient tracing of Ag NPs that are produced from, and hence labelled with, enriched 109Ag (Ag-En). The methods encompass a one-step anion exchange separation of Ag from the sample matrix and precise determination of 109Ag/107Ag ratios and 109Ag abundances by multiple-collector ICP-MS. The sample preparation procedure has an Ag yield of 104 ± 13% (1 SD) and a procedural Ag blank of less than 7 pg, enabling analysis of samples with only trace Ag contents. Analyses of Ag solutions and realistic samples show that careful correction of memory effects is paramount for ensuring data quality. Using appropriate procedures, the 109Ag/107Ag ratios of samples containing Ag-En can be determined to a precision and trueness of better than about 0.5%, when more than 0.5 ng Ag are available for analysis. Even if Ag is only present at 50 pg or less, the Ag isotope ratios and Ag-En concentrations of samples can be measured to better than 5 to 10%. The methods are therefore able to resolve the presence of 1 pg of Ag-En in samples that contain as little as 10 pg and to up to 1 ng of natural Ag. As such, the techniques allow robust detection and quantification of Ag-En in environmental samples even when highly variable quantities of Ag-En and natural Ag are present. The new methodology thus enables the use of stable isotope tracing to investigate the fate of Ag NPs in complex environmental systems at dosing concentrations similar to the predicted environmental concentrations and for very small samples, whilst also providing high sample throughput. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of JAAS (Journal of Analytical Atomic Spectrometry) is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1039/c8ja00358k
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      – Code: eng
        Text: English
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        PageCount: 11
        StartPage: 1173
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      – SubjectFull: Stable isotopes
        Type: general
      – SubjectFull: Environmental sampling
        Type: general
      – SubjectFull: Radiolabeling
        Type: general
      – SubjectFull: Silver nanoparticles
        Type: general
      – SubjectFull: Nanoparticles
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      – SubjectFull: Eco-labeling
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      – SubjectFull: Labels
        Type: general
    Titles:
      – TitleFull: High-sensitivity tracing of stable isotope labeled Ag nanoparticles in environmental samples using MC-ICP-MS.
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            NameFull: Junk, Tabea
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            NameFull: Rehkämper, Mark
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            – D: 01
              M: 06
              Text: Jun2019
              Type: published
              Y: 2019
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              Value: 34
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