JPS56111465A - Measuring method for cod value - Google Patents
Measuring method for cod valueInfo
- Publication number
- JPS56111465A JPS56111465A JP1412080A JP1412080A JPS56111465A JP S56111465 A JPS56111465 A JP S56111465A JP 1412080 A JP1412080 A JP 1412080A JP 1412080 A JP1412080 A JP 1412080A JP S56111465 A JPS56111465 A JP S56111465A
- Authority
- JP
- Japan
- Prior art keywords
- potassium permanganate
- tank
- measurement
- amount
- computer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012286 potassium permanganate Substances 0.000 abstract 6
- 238000005259 measurement Methods 0.000 abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 4
- 239000000243 solution Substances 0.000 abstract 3
- 238000004448 titration Methods 0.000 abstract 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 230000003647 oxidation Effects 0.000 abstract 2
- 238000007254 oxidation reaction Methods 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000007865 diluting Methods 0.000 abstract 1
- 239000012895 dilution Substances 0.000 abstract 1
- 238000010790 dilution Methods 0.000 abstract 1
- 239000011259 mixed solution Substances 0.000 abstract 1
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 abstract 1
- 229940039790 sodium oxalate Drugs 0.000 abstract 1
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1806—Biological oxygen demand [BOD] or chemical oxygen demand [COD]
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Emergency Medicine (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
PURPOSE:To reduce the cost of measurement greatly by obtaining the result of actual measurement without silver salt added by measuring chlorine ion concentration in sample water and by adding potassium permanganate, and then by obtaining a COD value by multiplying said result by an oxidation factor coefficient. CONSTITUTION:On the basis of a preliminary measurement resut, computer 6 determines the amount of dilution to sampled water 1' so that the titration amount of potassium permanganate will be 4-6ml, for example. Consequently, computer 6 supplies sampled water 1' and diluting water 12 to reaction tank 9. Then, sulfuric acid 15 and potassium permanganate solution 18 are similarly fed to tank 9 by 10ml each and heatd, and sodium oxalate solution 21 is added by 10ml to the mixed solution in tank 9, 30min later to stop the reaction.Next, valve 22 is opened to supply potassium permanganate solution 18 to tank 9 for titration. Next, computer 9 calculates the amount of potassium permanganate, subtracts it from the titration amount of potassium permanganate in measurement, and by multiplies the difference by an oxidation factor coefficient to obtain a COD value. Thus, the number of measuring circuits is decreased and the cost can be reduced greatly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1412080A JPS56111465A (en) | 1980-02-06 | 1980-02-06 | Measuring method for cod value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1412080A JPS56111465A (en) | 1980-02-06 | 1980-02-06 | Measuring method for cod value |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56111465A true JPS56111465A (en) | 1981-09-03 |
| JPH0137690B2 JPH0137690B2 (en) | 1989-08-09 |
Family
ID=11852254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1412080A Granted JPS56111465A (en) | 1980-02-06 | 1980-02-06 | Measuring method for cod value |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56111465A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5860265U (en) * | 1981-10-20 | 1983-04-23 | 株式会社明電舎 | COD measuring device |
| CN108680716A (en) * | 2018-02-13 | 2018-10-19 | 华测检测认证集团股份有限公司 | A kind of chlorine-contained wastewater COD prescreening method |
| CN112816614A (en) * | 2020-12-30 | 2021-05-18 | 杭州谱育科技发展有限公司 | Self-adaptive titration method for potassium permanganate index |
-
1980
- 1980-02-06 JP JP1412080A patent/JPS56111465A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5860265U (en) * | 1981-10-20 | 1983-04-23 | 株式会社明電舎 | COD measuring device |
| CN108680716A (en) * | 2018-02-13 | 2018-10-19 | 华测检测认证集团股份有限公司 | A kind of chlorine-contained wastewater COD prescreening method |
| CN112816614A (en) * | 2020-12-30 | 2021-05-18 | 杭州谱育科技发展有限公司 | Self-adaptive titration method for potassium permanganate index |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0137690B2 (en) | 1989-08-09 |
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