Gas Adsorption and Desorption

Also see gas adsorption

The desorption isotherm may be considered to be a record of the removal of gas from the sample and as such is the reverse of the adsorption isotherm. The sample must be saturated with gas first before the full desorption isotherm can be measured. The desorption isotherm often follows a different path from the adsorption isotherm yielding a hysteresis loop; its shape indicates something about the complexity and shape of the pores within the sample. Pore size distribution can be calculated from both the adsorption and desorption isotherms, according to preference; both will give different results if a hysteresis loop is present.

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CD ROM Vol 2 was produced by staff at the Purdue University Cytometry Laboratories and distributed free of charge as an educational service to the cytometry community. If you have any comments please direct them to Dr. J. Paul Robinson, Professor & Director, PUCL, Purdue University, West Lafayette, IN 47907. Phone:(317) 494-0757; FAX (317) 494-0517; Web http://www.cyto.purdue.edu EMAIL robinson@flowcyt.cyto.purdue.edu