Analysis of tritiated water vapor by non-volatile liquid scintillant sorbent

The quantitative analysis of tritiated water vapor in air was investigated by sorption into a non-volatile liquid scintillant solution sorbent of silicone oil. The activity of the beta-ray from the sorbed tritiated water vapor, 10(-7) microCi/mL in air, was directly measured with the help of the scintillator solution which also served as the sorbent. It was found that the variation of the partial vapor pressure of tritiated water in air was proportional to the sorbed amount in the liquid scintillator sorbent from the vaporized tritiated water. The relation was also expressed as a sorption isotherm equation and was compared to the Langmuir adsorption isotherm supporting the suggested adsorption by solid adsorbent.