Measurement of the amount sorbed as a function of sorbate pressure at constant temperature. The pressure may be the absolute pressure referenced to vacuum (IGA-001), the relative pressure referenced to saturation vapor pressure P0 (IGA-002), the partial pressure (IGA-003) or relative density (e.g. humidity) for dynamic water sorption experiments using the IGAsorp. Isotherms may be measured at different temperatures to map phase diagrams or to enable calculation of the differential enthalpy and entropy of sorption using the Clausius-Clapeyron equation or van ‘t Hoff relation.
The amount sorbed is expressed in a range of units such as mmol/g and percentage uptake. It is also referred to as uptake, coverage, composition and concentration.
Related Instruments
IGA-001
High accuracy gravimetric analyzer, for precise characterization of gas sorption equilibria and kinetics
IGA-002
Single component gravimetric analyzer, for precise characterization of gas and vapor sorption equilibria and kinetics
IGA-003
High accuracy gravimetric analyzer, with combined pressure and flow control for precise characterization of thermodynamics and kinetics
