Title:
液中の気泡の検出方法
Document Type and Number:
Japanese Patent JP4054324
Kind Code:
B2
Abstract:
The presence of gas bubbles within the measurement zone of an enclosed cell for determination of physical or chemical properties of a liquid is detected by also measuring the electrical conductivity S under two different pressure conditions, and comparing the value delta S = (S1-S2) / S1 against a permitted threshold value k. The presence of gas bubbles within the measurement zone of an enclosed cell for determination of physical or chemical properties of a liquid is detected by also measuring the electrical conductivity S under two different pressure conditions, and comparing the value delta S = (S1-S2) / S1 against a permitted threshold value k. Electrical conductivity measurements S1 and S2 are made at, respectively, atmospheric pressure and 100-400 mbar, preferably 250 mbar. Comparison of the standardised value delta S / S1 = (S1-S2) / S1 with a permitted threshhold value k for the liquid, provides indication of the validity of the subsequent measurements.
More Like This:
Inventors:
Robert Gruevler
Egon Land Schutzer
Wolf-Dietrich Steinborg
Egon Land Schutzer
Wolf-Dietrich Steinborg
Application Number:
JP2004229564A
Publication Date:
February 27, 2008
Filing Date:
August 05, 2004
Export Citation:
Assignee:
F. HOFFMANN-LA ROCHE AKTIENGESELLSCHAFT
International Classes:
G01N27/06; G01F1/64; G01F1/72; G01F25/00; G01N7/00; G01N35/08; G01N27/10; G01N35/10
Domestic Patent References:
| JP2003513269A | ||||
| JP2030763Y2 | ||||
| JP3134042B2 |
Foreign References:
| EP1182264A2 |
Attorney, Agent or Firm:
Yusuke Hiraki
Ishii Teiji
Satoshi Fujita
Eiichi Arai
Ishii Teiji
Satoshi Fujita
Eiichi Arai