Direct measurements of D/H and 18O/l6O fractionation factors between vapor and liquid water in the temperature range from 10 to 40°C

Abstract

Vapor phase was separately collected without liquid condensate by raising the temperature of the container of vapor phase by 7°C higher than that of the interface of vapor-liquid equilibrium. D/H and 18O/16O measurements were done for the identical aliquot of vapor samples in equilibrium with the liquid water in the temperature range from 10 to 40°C. The empirical relationships between α D, α18O and the temperature of equilibration were obtained to be, 103lnα D = 2.408 × 106T-2 + 6.455 × 104T-1 - 168.7, 103lnα 18O = 5.9702 × 106T-2 - 3.2801 × 104T-1 + 52.227. © 1979, GEOCHEMICAL SOCIETY OF JAPAN. All rights reserved.