Title:
METHOD AND SYSTEM FOR DETECTING SALINITY
Document Type and Number:
Japanese Patent JP3089867
Kind Code:
B2
Abstract:
PURPOSE: To detect leakage of sea water quickly, positively, and automatically by measuring the acid conductivity while switching an ultrapure water, a standard liquid, and a sample liquid, and measuring the ion concentration of chloride when the acid conductivity of the sample liquid exceeds a set level.
CONSTITUTION: A conductivity detector 18 measures the conductivity of ultrapure water 2, at first. Since the ultrapure water 2 initially contains neither cation seed nor anion seed, a signal from the detector 18 passes through a membrane from the outside to the inside of a cation exchange tube thus exhibiting the conductivity of a base line caused by the migration of sulfuric acid in a removed liquid according to the concentration gradient. A standard liquid 3 has a specific acid conductivity and employed for determining a calibration curve basing on the increase of acid conductivity from the base line. When the conductivity of the sample liquid 1 exceeds a preset level, an ion chromatography measures chloride ions in the sample liquid 1 thus deciding whether leakage of sea water caused increase of conductivity of the sample liquid 1.
Inventors:
Ken Murayama
Toshiki Ohara
Toshiki Ohara
Application Number:
JP34236492A
Publication Date:
September 18, 2000
Filing Date:
December 22, 1992
Export Citation:
Assignee:
Yokogawa Electric Corporation
International Classes:
G01N27/06; G01M3/04; G01N30/02; G01N30/04; G01N30/34; G01N30/88; (IPC1-7): G01N30/02; G01M3/04; G01N27/06; G01N30/04; G01N30/88
Domestic Patent References:
| JP219764A | ||||
| JP3279858A | ||||
| JP1134254U |