Measuring and testing – Gas content of a liquid or a solid – By vibration
Patent
1978-11-20
1981-03-24
Ruehl, Charles A.
Measuring and testing
Gas content of a liquid or a solid
By vibration
55158, G01N 710
Patent
active
042572576
ABSTRACT:
A carrier gas is passed through a liquid-repellent porous partition tubing having channels extending through the wall of the tubing and immersed in the liquid to be tested, causing a gaseous or volatile substance to permeate through the wall and diffuse into the carrier gas in the tubing. The carrier gas flowing out from the outlet of the tubing and containing a quantity of the substance in equilibrium with the liquid phase is led to a detector connected to the outlet, whereby the concentration of the gaseous or volatile substance in the liquid can be detected continuously or intermittently with high efficiency. The tubing, which is liquid-repellent, prevents ingress of the liquid into the channels but permits the gaseous or volatile substance to diffuse into the carrier gas through a gas layer in the channels at an exceedingly high velocity, thus affording measurements with a short response time. The disclosed method and apparatus are very useful for fermentation processes, brewing processes, cultivation of microorganisms, treatment of fluid oils and fats, and disposal of industrial waste water and are also amenable to the automatic control of such processes.
REFERENCES:
patent: 3438241 (1969-04-01), McKinley, Jr.
patent: 3567666 (1971-03-01), Berger
patent: 3866460 (1975-02-01), Pearce, Jr.
patent: 4032309 (1977-06-01), Salemme
"Measurement of Dissolved Oxygen in Fermentations", by D. H. Phillips and M. J. Johnson, Journal of Biochemical and Microbiological Tech. & Engr., vol. III, No. 3, pp. 261-275 (1961).
"Studies of the Measurement of Dissolved Oxygen in Fermentation by Tubing Method", by Cheng-Ching Chen, Journal of Chinese Inst. of Chem. Engrs., 1970, vol. 1, pp. 55-64.
"Desorption of Carbon Dioxide from Fermentation Broth", by H. Yagi and F. Yoshida, Biotechnology and Bioengineering, vol. XIX, pp. 801-819 (1977).
Dairaku Kazuo
Kuki Kazuo
Kanegafuchi Kagaku Kogyo & Kabushiki Kaisha
Ruehl Charles A.
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