Patent ID: 8067244
Filing Date: 2011-11-29
Classification: G01N

Abstract:
1. A method for determining the influence of a surface layer on the rate with which a gas occupies pores in a material, said method comprising the steps of: a) exposing the material without said surface layer to said gas; b) measuring light absorption by the gas occupying pores in the material without the surface layer to determine a first time constant for a change in the measured absorption of light by the gas; c) exposing the material with the surface layer to said gas; d) measuring light absorption by the gas occupying pores in the material through the surface layer to determine a second time constant for a change in the measured absorption of light by the gas; and e) comparing the first and second time constants to determine the relative rates with which the gas occupies pores within the material; wherein said material is a food and said surface layer is a plastic or paper laminated based enclosure of said food; and, wherein the measuring step in b) and/or d) is a GASMAS method comprising absorption spectroscopy measurement of said gas in scattering media.