JPS5667753A - Nitrogen analytical device - Google Patents
Nitrogen analytical deviceInfo
- Publication number
- JPS5667753A JPS5667753A JP14353379A JP14353379A JPS5667753A JP S5667753 A JPS5667753 A JP S5667753A JP 14353379 A JP14353379 A JP 14353379A JP 14353379 A JP14353379 A JP 14353379A JP S5667753 A JPS5667753 A JP S5667753A
- Authority
- JP
- Japan
- Prior art keywords
- nitrogen
- sample
- sample solution
- tube
- catalyst
- 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 recover the nitrogen content of test sample in 100% by thermally cracking sample solution after adding acidic substance so that it may show a value below the specific pH level, when the sample containing nitrate nitrogen and nitrite nitrogen is thermally cracked and this nitrogen is converted to NH3 using catalyst to measure the nitrogen content.
CONSTITUTION: Sample solution containing nitrate nitrogen and nitrite nitrogen is introduced into sample board 9 of sample introduction part 1 through injection port 8, and then is conducted to the inlet part 10 of pyrolysis tube 3. Hydrogen is sent in through hydrogen introduction part 11. Sample solution is converted to NH3 by catalyst 12 filled in the center of the tube 3. The tube 3 is heated inside furnace 2 at sample cracking temperature of 700°C and catalytic temperature of 600°C. Produced NH3 is titrated by titration cell 5 and fluctuations of its ionic concentration is measured by means of ammeter 6. The measurements are recorded by recorder 7. During said pyrolysis, sample solution is added with sulfuric acid or phosphoric acid or substance containing the ion of said acid, so that it is prepared to show a pH value below 1.8 level. Thus it is possible to completely crack and recover nitrate nitrogen and nitrite nitrogen from the sample solution and obtain accurate analysis value.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14353379A JPS5667753A (en) | 1979-11-06 | 1979-11-06 | Nitrogen analytical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14353379A JPS5667753A (en) | 1979-11-06 | 1979-11-06 | Nitrogen analytical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5667753A true JPS5667753A (en) | 1981-06-08 |
Family
ID=15340949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14353379A Pending JPS5667753A (en) | 1979-11-06 | 1979-11-06 | Nitrogen analytical device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5667753A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58137741A (en) * | 1982-02-12 | 1983-08-16 | Sagami Chem Res Center | Method and apparatus for measuring stable isotope |
-
1979
- 1979-11-06 JP JP14353379A patent/JPS5667753A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58137741A (en) * | 1982-02-12 | 1983-08-16 | Sagami Chem Res Center | Method and apparatus for measuring stable isotope |
| JPH0244014B2 (en) * | 1982-02-12 | 1990-10-02 | Sagami Chem Res |
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