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Elemental composition of nanoparticles with the nano aerosol mass spectrometer.
Anal Chem 2010; 82(19):8034-8AC

Abstract

The nano aerosol mass spectrometer (NAMS) irradiates individual, size selected nanoparticles with a high energy laser pulse to generate a mass spectrum consisting of multiply charged atomic ions. The elemental composition of the particle is determined from the ion signal intensities of each element, which requires deconvoluting isobaric ion signals at 4 m/z (O(4+) and C(3+)) and at 8 m/z (O(2+) and S(4+)). A method to deconvolute these ion signals using sucrose and ammonium sulfate as calibrants is presented. The approach is based on the assumption that the charge state distribution of a given element is independent of the chemical form of that element in the particle. Relative to previously reported methodology, the new approach permits accurate and precise determination of sulfur, which is crucial for interpretation of ambient nanoparticle data sets. With this approach, the differences between expected and measured elemental ratios of C, O, N, and S for a variety of test particles were generally much less than 10%, although a difference as high as 16% was observed.

Authors+Show Affiliations

Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

20804130

Citation

Zordan, Christopher A., et al. "Elemental Composition of Nanoparticles With the Nano Aerosol Mass Spectrometer." Analytical Chemistry, vol. 82, no. 19, 2010, pp. 8034-8.
Zordan CA, Pennington MR, Johnston MV. Elemental composition of nanoparticles with the nano aerosol mass spectrometer. Anal Chem. 2010;82(19):8034-8.
Zordan, C. A., Pennington, M. R., & Johnston, M. V. (2010). Elemental composition of nanoparticles with the nano aerosol mass spectrometer. Analytical Chemistry, 82(19), pp. 8034-8. doi:10.1021/ac101700q.
Zordan CA, Pennington MR, Johnston MV. Elemental Composition of Nanoparticles With the Nano Aerosol Mass Spectrometer. Anal Chem. 2010 Oct 1;82(19):8034-8. PubMed PMID: 20804130.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Elemental composition of nanoparticles with the nano aerosol mass spectrometer. AU - Zordan,Christopher A, AU - Pennington,M Ross, AU - Johnston,Murray V, PY - 2010/9/1/entrez PY - 2010/9/2/pubmed PY - 2011/1/21/medline SP - 8034 EP - 8 JF - Analytical chemistry JO - Anal. Chem. VL - 82 IS - 19 N2 - The nano aerosol mass spectrometer (NAMS) irradiates individual, size selected nanoparticles with a high energy laser pulse to generate a mass spectrum consisting of multiply charged atomic ions. The elemental composition of the particle is determined from the ion signal intensities of each element, which requires deconvoluting isobaric ion signals at 4 m/z (O(4+) and C(3+)) and at 8 m/z (O(2+) and S(4+)). A method to deconvolute these ion signals using sucrose and ammonium sulfate as calibrants is presented. The approach is based on the assumption that the charge state distribution of a given element is independent of the chemical form of that element in the particle. Relative to previously reported methodology, the new approach permits accurate and precise determination of sulfur, which is crucial for interpretation of ambient nanoparticle data sets. With this approach, the differences between expected and measured elemental ratios of C, O, N, and S for a variety of test particles were generally much less than 10%, although a difference as high as 16% was observed. SN - 1520-6882 UR - https://www.unboundmedicine.com/medline/citation/20804130/Elemental_composition_of_nanoparticles_with_the_nano_aerosol_mass_spectrometer_ L2 - https://dx.doi.org/10.1021/ac101700q DB - PRIME DP - Unbound Medicine ER -