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Hydrogen-isotope analysis of nanomole (picoliter) quantities of H_2O

Eiler, John M. and Kitchen, Nami (2001) Hydrogen-isotope analysis of nanomole (picoliter) quantities of H_2O. Geochimica et Cosmochimica Acta, 65 (24). pp. 4467-4479. ISSN 0016-7037. doi:10.1016/S0016-7037(01)00723-2.

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We describe a technique for on-line reduction of water vapor carried in a He stream followed by continuous-flow mass spectrometry of evolved H_2 gas. This technique is appropriate for analysis of D/H ratios of ∼10^(−9) to ∼5 × 10^(−8) moles of water and has an external precision (1σ) typically varying between ±1.0 and 2.0‰. For specific ranges in sample size, temperature of the reduction reaction, and method of introducing evolved vapor into the mass spectrometer, this technique involves negligible analytical corrections (∼0 to 3‰) beyond those inherent to gas-source mass spectrometry of molecular hydrogen. We present an analysis of the D/H ratio of water released by stepped heating of a 10-mg fragment of the Shergottite-Nahklite-Chassignite meteorite ALH84001 and ∼1 to 2 μg of a terrestrial hydrous mineral (thermonatrite) as examples of possible applications making use of this technique.

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Additional Information:© 2001 Elsevier Science Ltd. Received December 7, 2000; accepted in revised form May 9, 2001. Associate editor: D. R. Cole.
Issue or Number:24
Record Number:CaltechAUTHORS:20121023-140518013
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Official Citation:John M Eiler, Nami Kitchen, Hydrogen-isotope analysis of nanomole (picoliter) quantities of H2O, Geochimica et Cosmochimica Acta, Volume 65, Issue 24, 15 December 2001, Pages 4467-4479, ISSN 0016-7037, 10.1016/S0016-7037(01)00723-2. (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35041
Deposited By: Ruth Sustaita
Deposited On:23 Oct 2012 21:19
Last Modified:09 Nov 2021 23:12

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