PSS PoroCheck uses
recognition of porous structures by diffusion of test molecules of
different size into the pores under the normal operating conditions of
the
porous material (not in a vacuum). This means that PoroCheck can also
measure fragile samples and investigate materials in various states
(dry, swollen, partially adsorbed).
Chromatographic porosimetry
relates sample retention to pore size using the
chromatographic separation theory developed by Cassasa and
Gorbunov.
The analysis
requires a conventional LC instrument. Running
an LC instrument is straight-forward to most users who would not
require additional training as would be the case with a gas adsorption
or Hg
intrusion device.
All results are retrieved
from a table relating
molecular size to chromatographic retention. The pore size distribution
is calculated based on a flexible chain model assuming fixed pore
boundaries. Cylinder and slit models are available to describe the pore
structure.
Detailed analysis of pore
accessibility yields a
multitude of analytical results, which can be derived from the pore
size distribution. Results can be presented in many ways (differential
or cumulative representation, volume or surface distribution).
PoroCheck is the first and only software which calculates error margins
for 50
and 95% accuracy.
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