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Hydrogen analysis in minerals by continuous-flow mass spectrometry
-
Julie A. O’Leary
,
George R. Rossman
Published/Copyright:
April 1, 2015
Abstract
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% H2O 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
Keywords: Hydrogen; hydrogen analysis; water content; continuous flow mass spectrometry; nominally anhydrous minerals; IRMS
Received: 2007-1-22
Accepted: 2007-8-6
Published Online: 2015-4-1
Published in Print: 2007-11-1
© 2015 by Walter de Gruyter Berlin/Boston
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Keywords for this article
Hydrogen;
hydrogen analysis;
water content;
continuous flow mass spectrometry;
nominally anhydrous minerals;
IRMS
Articles in the same Issue
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