Dynamic Vapour Sorption (DVS)
Analyte:
- Solid samples with sensitivity of water vapour
- Samples can used dry or wet
- 0.5 – 1 g sample material (dependent of specific surface)
Equipment:
Vapour sorption apparature, composed of:
- Temperature controlled chamber for samples
(variance of temperature: 5 to 50 °C) - Cahn-balance
Evaluation methods and targets:
- Determination of water vapour sorption by variable rel. moisture (0 to 98 %) and constant temperature (equilibrium moistere content)
- Determination of sorption and desorption-isotherms
- Kinetic measurement of water vapour sorption by constant rel. moisture and temperature
- Application of other solvents – restricted possible
- Calculation of specific surface by taking as a basis of special analysis software
Application examples:
- Determination of water vapour sorption of bead cellulose
- Determination of sorption dates of foamed chitosan
- Determination of sorption kinetic of wood chips