The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 1984
Filed:
Mar. 11, 1982
Takehisa Nakayama, Takasago, JP;
Kanegafuchi Kagaku Kogyo Kabushiki Kaisha, Osaka, JP;
Abstract
An apparatus and method for measuring the concentration of a gaseous or volatile substance in a liquid, which comprises passing a carrier gas through a liquid-repellent porous partition tubing, immersed in a liquid, having continuous minute channels extending through the tubing wall, introducing to a gas detector the gaseous volatile substance passing from the liquid into the carrier gas through the continuous minute channels while controlling the flow rate and the pressure of the carrier gas by simultaneously operating both a carrier gas control means and a choking means. Also disclosed is a method for the measurement of the same which is equipped with sterilization, calibration and standby function so that it may be immediately applied to an actual industrial scale process including cultivation of microorganisms, brewing and the like. Further disclosed are various measuring apparatus for the practicing of the foregoing methods. Porous partition tubing made of tetrafluoroethylene resin is used having an average pore size of about 0.1 to 1.0 .mu.m and a porosity of about 20 to 80%. The carrier gas is controlled to produce a specific pressure difference under certain conditions.