Method and apparatus for measurement, by means of a chromatograph is isostatic gas, it is a wall at the respect of a gas or vapor or of the two

摘要

P the invention describes a method and apparatus for measuring, with the aid of a gas chromatograph isostatic, the permeability of a wall with respect to a gas or vapor or both. / p & & p & is caused to circulate a reference gas (at the same pressure as the gas contained in the hollow body to be verified) around this body, and then in the spiral to sample of a chromatograph is injected periodically the gas (preferably) of this spiral, rendered impure, in the gas current vector of a chromatograph to a qualitative and quantitative measurement of the impurity (gas which escapes from the inside of the hollow body.). The process is applicable to the verification of the sealing of various packages. / p