JPS5550159A - Cod measurement - Google Patents
Cod measurementInfo
- Publication number
- JPS5550159A JPS5550159A JP12375278A JP12375278A JPS5550159A JP S5550159 A JPS5550159 A JP S5550159A JP 12375278 A JP12375278 A JP 12375278A JP 12375278 A JP12375278 A JP 12375278A JP S5550159 A JPS5550159 A JP S5550159A
- Authority
- JP
- Japan
- Prior art keywords
- earth metal
- alkaline earth
- phosphate salt
- cod
- correct
- 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.)
- Pending
Links
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
PURPOSE: To simply mask an alkaline earth metal so that the correct COD may be measured by adding phosphoric acid or soluble phosphate salt to test water thereby to remove the alkaline earth metal compound.
CONSTITUTION: In order to prepare a phosphate salt of an alkaline earth metal, prior to the oxidization of permanganate, sodium dihydrogen phosphate is added in a quantity equal to or more than the alkaline earth metal as phosphoric acid or an additive containing a phosphate radical or an aqueous solution of soluble phosphate salt. As a result, the phosphate salt, which cannot be easily dissolved, can be precipitated. Thus, the alkaline earth metal can be easily masked to eliminate the ingerference thereof so that the correct COD can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12375278A JPS5550159A (en) | 1978-10-05 | 1978-10-05 | Cod measurement |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12375278A JPS5550159A (en) | 1978-10-05 | 1978-10-05 | Cod measurement |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5550159A true JPS5550159A (en) | 1980-04-11 |
Family
ID=14868426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12375278A Pending JPS5550159A (en) | 1978-10-05 | 1978-10-05 | Cod measurement |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5550159A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6457192U (en) * | 1987-09-30 | 1989-04-10 |
-
1978
- 1978-10-05 JP JP12375278A patent/JPS5550159A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6457192U (en) * | 1987-09-30 | 1989-04-10 | ||
JPH0545665Y2 (en) * | 1987-09-30 | 1993-11-24 |
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