Aqueous Solutions of Deuterium Oxide
نویسنده
چکیده
The differences between the boiling points of dilute aqueous solutions of heavy water and the boiling point of ordinary water were measured in the range from 0.3 to 7 percent of D 20. The boiling points were found to increase linearly with increase in D 20, according to the equation mole % of D20 = 70.9 (tJ.T), where tJ.T is the boiling point in degrees centigrade minus 100. The measmements, made with ebulliometers of the type devised by W. Swi~toslawski, were found to offer a. rapid method for the analysis of solutions of heavy water. The differences between the boiling points and condensation temperatures of the same solutions were measured in a differential ebulliometer which gave a fractionation equivalent to about one theoretical plate. The small separation between the vapor and liquid lines on the boiling-point-composition diagram shows that the separation of heavy water by fractional distillation would require columns of extremely high efficiency.
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