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Multisample conversion of water to hydrogen by zinc for stable isotope determination

Analytical Chemistry

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DOI: 10.1021/ac00284a058

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Abstract

Two techniques for the conversion of water to hydrogen for stable isotope ratio determination have been developed that are especially suited for automated multisample analysis. Both procedures involve reaction of zinc shot with a water sample at 450 ??C. in one method designed for water samples in bottles, the water is put in capillaries and is reduced by zinc in reaction vessels; overall savings in sample preparation labor of 75% have been realized over the standard uranium reduction technique. The second technique is for waters evolved under vacuum and is a sealed-tube method employing 9 mm o.d. quartz tubing. Problems inherent with zinc reduction include surface inhomogeneity of the zinc and exchange of hydrogen both with the zinc and with the glass walls of the vessels. For best results, water/zinc and water/glass surface area ratios of vessels should be kept as large as possible.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Multisample conversion of water to hydrogen by zinc for stable isotope determination
Series title:
Analytical Chemistry
DOI:
10.1021/ac00284a058
Volume
57
Issue:
7
Year Published:
1985
Language:
English
Publisher:
American Chemical Society
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
1437
Last page:
1440
Number of Pages:
4