NDLI: An inter-laboratory comparison of high precision stable isotope ratio measurements for nanoparticle tracing in biological samples

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Journal of Analytical Atomic Spectrometry Vol - 29 Issue - 2

Journal of Analytical Atomic Spectrometry Vol -19

Journal of Analytical Atomic Spectrometry Vol -11

Journal of Analytical Atomic Spectrometry Vol -9

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An inter-laboratory comparison of high precision stable isotope ratio measurements for nanoparticle tracing in biological samples

Content Provider	Royal Society of Chemistry (RSC)
Author	Oytam, Yalchin McCall, Maxine Larner, Fiona Gulson, Brian Rehkämper, Mark
Copyright Year	2014
Abstract	Stable isotope labeling coupled with high precision isotope ratio measurements by multiple collector-ICP-MS is effective for tracing zinc from zinc oxide nanoparticles (ZnO NPs) in complex media and against a high zinc background. Using this technique, a previous study detected a slightly enhanced uptake of Zn in the blood of human females following dermal exposure to a sunscreen containing ZnO NPs, relative to a sunscreen of the same formulation but with larger ZnO particles (‘bulk’ material). Until now, the results of these exposures and the accuracy of the analyses, which require the resolution of subtle differences in Zn isotope ratios, have not been independently confirmed. Here we compare data from the previous study with results obtained in new, independent analyses of the same and additional samples, that were performed using similar techniques and instrumentation but in a different laboratory. The data sets are in good agreement, with a Pearson correlation coefficient of r ≈ 0.98, thus establishing the usefulness of the methods for tracing engineered ZnO NPs (and other anthropogenic sources of Zn) in Zn-rich biological materials. Previously unanalyzed blood samples from the earlier study provide further evidence for the increased uptake of Zn from ZnO NPs relative to bulk ZnO and they confirm that uptake rates decrease once sunscreen application has ceased.
Starting Page	471
Ending Page	477
Page Count	7
File Format	HTM / HTML PDF
ISSN	02679477
Volume Number	29
Issue Number	3
Journal	Journal of Analytical Atomic Spectrometry
DOI	10.1039/c3ja50322d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Pearson Isotope Zinc Zinc oxide Complex (magazine) Sunscreen Pearson product-moment correlation coefficient
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Analytical Chemistry

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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