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Calibration of isotope ratio mass spectrometry working standard for2H/1H ratio analysis

✍ Scribed by Lee, W.-N. Paul; Lim, Shu; Bassilian, Sara; Bergner, E. Anne

Book ID
101222964
Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
204 KB
Volume
33
Category
Article
ISSN
1076-5174

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✦ Synopsis

A method is described for the calibration of an isotope ratio mass spectrometry working standard for 2H/1H analysis using highly puriÐed (> 99.99% enriched) deuterium oxide

Serial dilution of such a compound can (2H 2 O). be used to construct a standard curve for calibration purposes using the relationship

where APE is the atom percent excess. It was found that the determined had a precision of »1% . Most of the r WR variation came from sample handling, which includes the serial dilution of the weighed deuterium oxide, the reduction of water to hydrogen gas and the introduction of the hydrogen gas into the mass spectrometer. The use of this calibration procedure allows the direct determination of the isotope ratio and APE from a standard curve r SA , over a wide range of enrichment. Unlike the reference standards V-SMOW and SLAP, the highly puriÐed deuterium oxide is non-exhaustible and readily available. The highly puriÐed deuterium oxide should be used in place of secondary standards to calibrate working references for 2H/1H analysis in biological studies.

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