Abstract
The electrolytic separation coefficient α has been determined for the chlorine isotope separation in the electrolysis of sodium chloride solutions at a platinum anode. Flotation of purified NaCl crystals in ethylene dibromide was employed as the analytical procedure in determining the isotopic composition of samples. Densities of the ethylene dibromide as a function of temperature were separately determined. The electrolytic separation factor for Cl isotopes was found to be 1.0060±0.0005 for the temperature range 25° to 40°C. No significant dependence on either temperature or current density was observed. The coefficient on platinum (1.0060±0.0005) agrees with the value on Acheson graphite (1.0068±0.0014) which may be computed from the data of Yacouban.
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