Title:
MEASURING METHOD FOR CONCENTRATION
Document Type and Number:
Japanese Patent JP2557152
Kind Code:
B2
Abstract:
PURPOSE: To obtain the method capable of contriving the simplification of a device and measuring at high precision.
CONSTITUTION: With pH of a solution containing a substance to be measured iondissociating in the solution and having steam pressure at a non-dissociation condition regulated, the concentration of the substance to be measured therein is continuously measured by the use of a gas electrode with a diaphragm 1. At the time the pH regulation of the solution is performed by continuously bringing the solution into contact with an acid solution, the solution into contact with an alkali solution or a pH buffer solution through an ion exchange membrane 2. A cylinder pump, an agitator and the like for pH regulation are not needed and the simplification, light weight and low cost of a device can be contrived. The ion exchange membrane 2 and a detection electrode are easy to wash and the maintenance and inspection thereof become easy, so that its time can be reduced. High sensitivity can be easily achieved in the measurement of CO2, NH3 and the like, furthermore the compensation of temperature is unnecessary if a pH regulation vessel 3 is made a thermostatic chamber and measurement precision is improved.
Inventors:
NOZAKI TAKESHI
HAMAMOTO OSAMU
HAMAMOTO OSAMU
Application Number:
JP28888291A
Publication Date:
November 27, 1996
Filing Date:
November 05, 1991
Export Citation:
Assignee:
KOGYO GIJUTSU INCHO
MITSUI ZOSEN KK
MITSUI ZOSEN KK
International Classes:
G01N27/28; G01N27/416; (IPC1-7): G01N27/416; G01N27/28
Attorney, Agent or Firm:
Director, Electronic Technology Research Institute, AIST (1 outside)
Kawakita Takecho
Kawakita Takecho