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Hydrogen analysis in minerals by continuous-flow mass spectrometry

O’Leary, Julie A. and Rossman, George R. and Eiler, John M. (2007) Hydrogen analysis in minerals by continuous-flow mass spectrometry. American Mineralogist, 92 (11-12). pp. 1990-1997. ISSN 0003-004X. doi:10.2138/am.2007.2575.

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We present a method for on-line dehydration of small quantities of hydrous and nominally anhydrous minerals followed by measurement of the absolute abundance of hydrogen released from the sample by continuous-flow mass spectrometry. This method is appropriate for measuring water content between 18 ppm and 10 wt% H_2O and requires a minimum of ~2 × 10^(−8) of hydrogen per analysis. The hydrogen needed for an analysis corresponds to 10–200 μg of hydrous minerals or 5–40 mg of nominally anhydrous minerals. We develop measurement protocols for garnet and pyroxene, two nominally anhydrous minerals that are potentially major reservoirs of hydrogen in the mantle.

Item Type:Article
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URLURL TypeDescription
Rossman, George R.0000-0002-4571-6884
Additional Information:© 2007 by the Mineralogical Society of America. Manuscript received January 22, 2007. Manuscript accepted August 6, 2007. Manuscript handled by Eugen Libowitzky. We thank E. Miura Boyd, D. Bell, and M. Baker for graciously supplying sample materials. We thank E. Libowitzky and A. Beran for thoughtful reviews that improved this manuscript. This work was supported by National Science Foundation grants no. EAR-0337736 and EAR-0337816. J. O’Leary was also supported by the Gordon and Betty Moore fellowship program.
Funding AgencyGrant Number
Gordon and Betty Moore FellowshipUNSPECIFIED
Subject Keywords:Hydrogen; hydrogen analysis; water content; continuous flow mass spectrometry; nominally anhydrous minerals; IRMS
Issue or Number:11-12
Record Number:CaltechAUTHORS:20130226-095634905
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Official Citation: Julie A. O’Leary, George R. Rossman, and John M. Eiler Hydrogen analysis in minerals by continuous-flow mass spectrometry American Mineralogist, November-December, v. 92, p. 1990-1997, doi:10.2138/am.2007.2575
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37141
Deposited By: Tony Diaz
Deposited On:26 Feb 2013 20:19
Last Modified:09 Nov 2021 23:27

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