Acoustical investigation of adsorption isotherms of water vapor

For determining multimolecular adsorption isotherms of water vapor on the surface of solid surface acoustic waves is proposed to use. It has been shown that the relative change of SAW velocity is proportional to the thickness of the adsorption layer. Therefore, the isotherm of SAW velocity change characterizes the adsorption isotherm of vapor. For the calibration of the vapor adsorption isotherm the original method, based on the determination of the thickness of the adsorbed layer at the zero value of temperature coefficient of delay is proposed to use.