Title:
METHOD FOR MONITORING POISONOUS SUBSTANCE IN WATER
Document Type and Number:
Japanese Patent JP3933239
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for monitoring poisonous substances in water whereby a death of an aquatic live that can swim is detected early and mixture of poisonous substances to the water can be continuously monitored.
SOLUTION: According to the method, a potential generated in a water bath 1 storing an aquatic live that can swim is detected by sensor electrodes 2, 3. The potential is integrated for every time unit for (c) minutes (0.5≤c≤30), which is set as an activity amount to be used to monitor poisonous substances in the water. The activity amount is logarithmically converted, and then an average value (μ) and a standard deviation (σ) are obtained. If the logarithmically converted activity amount becomes larger than a management upper limit μ+aσ (3≤a≤6) or smaller than a management lower limit μ-aσ (3≤a≤6), it is decided that poisonous substances are mixed in the water.
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Inventors:
Hiroshi Sakamoto
Kunihiko Yokoi
Satoshi Tagami
Yuzo Matsuo
Masahiro Fujii
Komaguchi Takahiro
Kunihiko Yokoi
Satoshi Tagami
Yuzo Matsuo
Masahiro Fujii
Komaguchi Takahiro
Application Number:
JP5373097A
Publication Date:
June 20, 2007
Filing Date:
March 10, 1997
Export Citation:
Assignee:
Okayama City
UNITIKA LTD.
UNITIKA LTD.
International Classes:
G01N33/18; G01N27/06; (IPC1-7): G01N33/18; G01N27/06
Domestic Patent References:
| JP1263555A | ||||
| JP4203961A | ||||
| JP64009365A | ||||
| JP61251769A |
Attorney, Agent or Firm:
Yoshihiro Morimoto
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