Apparatus for measuring the transmission rate of volatile organi

Details Apparatus for measuring the transmission rate of volatile organi Apparatus for measuring the transmission rate of volatile organi

1992-07-24

1993-11-30

Williams, Hezron E.

Measuring and testing

With fluid pressure

Porosity or permeability

73 232, G01N 1508

Patent

active

052654630

ABSTRACT:
A system for measuring the transmission rate of volatile organic chemicals through a barrier material, where a barrier material sample is clamped in a test cell so as to form a chamber on both sides of the material, with a temperature-controlled test gas conveyed into one chamber and a temperature-controlled carrier gas conveyed through the other chamber. The carrier gas is passed through a cryotrap where the organic chemicals are collected, and the carrier gas with collected chemicals is then burned in a flame ionization detector to measure the quantity of organic chemicals.

REFERENCES:
patent: 3498110 (1970-03-01), Brun
patent: 3590634 (1971-07-01), Pasternak et al.
patent: 3604246 (1971-09-01), Toren
patent: 3926561 (1975-12-01), Lucero
patent: 4091655 (1978-05-01), French et al.
patent: 4656865 (1987-04-01), Callan
patent: 4660411 (1987-04-01), Reid

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