Surface analysis

Dynamic Vapour Sorption (DVS)


  • Solid samples with sensitivity of water vapour
  • Samples can used dry or wet
  • 0.5 – 1 g sample material (dependent of specific surface)



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