Determination of deuterium concentration in melted ice samples by the chromium reduction method

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Determination of deuterium concentration in melted ice samples by the chromium reduction method

Hideaki Motoyama, Shinji Morimoto and Okitsugu Watanabe*

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Abstract: We measured the isotope ratio of hydrogen (dD)in melted ice samples by reduction of the water sample with chromium powder. The reproducibility of thedD measurement is within+.*ῌ. ThedD of surface snow from coast to inland on the Antarctica ice sheet was measured. The measurement range was from ,**ῌto .**ῌ. ThedD of surface snow decreased gradually from coast to inland. Varia- tions ofdD agree withd⁺²O fluctuations. The deuterium excess in the coastal region was small, less than+*ῌ. We established the method of determiningdD in melted ice samples, which can be used to investigate the global environment system.

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