Determination of D₂O Concentration by Fourier Infra-red Spectrophotometry

A method to determine D2O concentration （mole fraction）of high, medium and low heavy water with fourier infra-red spectrophotometer was established. Its outstanding advantages were rapid, convenient, less sample （0.2mL sample）, high precision, direct determination without pretreatment. For 99.84 % D₂O, the precision was better than 0.0006%. The determined range of D2O was 99.92%-0.015%。