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Determination of Metal Impurities in Carbon Nanotubes Sampled Using Surface Wipes

Residual metal impurities in carbon nanotubes (CNTs) provide a means to distinguish CNT from non-CNT sources of elemental carbon in environmental samples. A practical and cost-effective analytical approach is needed to support routine surface monitoring of CNT metal tracers using wipe sampling. Wipe...

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Detalles Bibliográficos
Autores principales: Avramescu, Mary-Luyza, Rasmussen, Pat E., Chénier, Marc
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5128706/
https://www.ncbi.nlm.nih.gov/pubmed/27974992
http://dx.doi.org/10.1155/2016/3834292
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author Avramescu, Mary-Luyza
Rasmussen, Pat E.
Chénier, Marc
author_facet Avramescu, Mary-Luyza
Rasmussen, Pat E.
Chénier, Marc
author_sort Avramescu, Mary-Luyza
collection PubMed
description Residual metal impurities in carbon nanotubes (CNTs) provide a means to distinguish CNT from non-CNT sources of elemental carbon in environmental samples. A practical and cost-effective analytical approach is needed to support routine surface monitoring of CNT metal tracers using wipe sampling. Wipe sampling for CNT metal tracers is considered a qualitative indicator of the presence of CNTs, not a quantitative exposure metric. In this study, two digestion approaches (microwave-assisted nitric acid/H(2)O(2) digestion and ultrasonic nitric/HF acid digestion) in conjunction with Inductively Coupled Plasma Mass Spectrometry (ICP-MS) determination were evaluated for their ability to extract metal impurities from CNT particles captured on wipe substrates. Aliquots of different carbon nanotubes (including NIST 2483 single-wall CNT) with and without GhostWipes™ (ASTM E-1792 compliant) were used to compare the performance of the digestion methods. The microwave digestion method accommodated the bulky wipe sample and also eliminated potential ICP-MS signal interferences related to incomplete digestion. Although quantitative recoveries requiring lengthy multistep digestion protocols may be necessary in other applications, the near-total recoveries achieved in the present study for CNT catalyst elements were adequate for identifying surface contamination of CNTs in the workplace using wipe sampling.
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spelling pubmed-51287062016-12-14 Determination of Metal Impurities in Carbon Nanotubes Sampled Using Surface Wipes Avramescu, Mary-Luyza Rasmussen, Pat E. Chénier, Marc J Anal Methods Chem Research Article Residual metal impurities in carbon nanotubes (CNTs) provide a means to distinguish CNT from non-CNT sources of elemental carbon in environmental samples. A practical and cost-effective analytical approach is needed to support routine surface monitoring of CNT metal tracers using wipe sampling. Wipe sampling for CNT metal tracers is considered a qualitative indicator of the presence of CNTs, not a quantitative exposure metric. In this study, two digestion approaches (microwave-assisted nitric acid/H(2)O(2) digestion and ultrasonic nitric/HF acid digestion) in conjunction with Inductively Coupled Plasma Mass Spectrometry (ICP-MS) determination were evaluated for their ability to extract metal impurities from CNT particles captured on wipe substrates. Aliquots of different carbon nanotubes (including NIST 2483 single-wall CNT) with and without GhostWipes™ (ASTM E-1792 compliant) were used to compare the performance of the digestion methods. The microwave digestion method accommodated the bulky wipe sample and also eliminated potential ICP-MS signal interferences related to incomplete digestion. Although quantitative recoveries requiring lengthy multistep digestion protocols may be necessary in other applications, the near-total recoveries achieved in the present study for CNT catalyst elements were adequate for identifying surface contamination of CNTs in the workplace using wipe sampling. Hindawi Publishing Corporation 2016 2016-11-16 /pmc/articles/PMC5128706/ /pubmed/27974992 http://dx.doi.org/10.1155/2016/3834292 Text en Copyright © 2016 Mary-Luyza Avramescu et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Avramescu, Mary-Luyza
Rasmussen, Pat E.
Chénier, Marc
Determination of Metal Impurities in Carbon Nanotubes Sampled Using Surface Wipes
title Determination of Metal Impurities in Carbon Nanotubes Sampled Using Surface Wipes
title_full Determination of Metal Impurities in Carbon Nanotubes Sampled Using Surface Wipes
title_fullStr Determination of Metal Impurities in Carbon Nanotubes Sampled Using Surface Wipes
title_full_unstemmed Determination of Metal Impurities in Carbon Nanotubes Sampled Using Surface Wipes
title_short Determination of Metal Impurities in Carbon Nanotubes Sampled Using Surface Wipes
title_sort determination of metal impurities in carbon nanotubes sampled using surface wipes
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5128706/
https://www.ncbi.nlm.nih.gov/pubmed/27974992
http://dx.doi.org/10.1155/2016/3834292
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