An amperometric sensor for the measurement of D 2 O concentration in a mixture of H 2 O and D 2 O has been studied using CaZr 0.9 ln 0.1 O 3 − α as a high temperature protonic conductor. When the sensor heated at 1173 K was exposed to air passed through the H 2 O + D 2 O mixture at 293 K, it could respond to D 2 O in the concentration range of 5 to 100% with a 90% response time of about 15 min.
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Hibino et al. (1994) studied this question.
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