Patent ID: 6354138
Filing Date: 2002-03-12
Classification: G01N

Abstract:
A method of validating permeation measurements of vapors, made through closed containers containing one or more closure members, by subtracting the contribution to permeation measurement caused by the one or more closure members, comprising the steps of:a) measuring the permeation of vapors through a first container of a first predetermined size, with the one or more closure members in place; b) varying the surface area size of the first container by a predetermined factor â€œmâ€ , to form a second closed container of the same material as the first closed container, thereby forming a second closed container having a surface area of â€œmâ€  times the surface area of said first container, with the one or more closure members in place on the second closed container; c) measuring the permeation of vapors through the second container; d) reducing the measured permeation values of both the first container and the second container by equal increments until the respective reduced measurement values are in the same ratio as the factor â€œmâ€ ; and e) using the reduced measurement permeation values as respective measurements of the actual permeation through the first and second containers, thereby correcting for the contribution of the closure members to the measured permeation values and thereby validating the permeation measurements.