ISO 3697:1976
Withdrawn
Sodium hydroxide for industrial use — Determination of calcium and magnesium contents — Flame atomic absorption method
Hardcopy , PDF
English, French
11-01-1976
04-05-2019
Applicable to products having contents of more than 2.5 mg Ca/kg and 0.5 mg Mg/kg if an acetylene-air flame is used or 0.6 mg Ca/kg and 1.0 mg Mg/kg if an acetylen-dinitrogen monoxide flame is used. The principle consists in the acidification of a test portion with hydrochloric acid, aspiration of the solution into an acetylene-dinitrogen monoxide flame or acetylene-air flame. In the latter case, addition of lanthanum ions in order to suppress certain interferences. Measurement of the absorption of the 422.7-nm and 285.2-nm lines emitted by calcium and magnesium hollow-cathode lamps.
| Committee |
ISO/TC 47
|
| DevelopmentNote |
Also numbered as BS 6075-9(1981) (09/2005)
|
| DocumentType |
Standard
|
| Pages |
4
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| Standards | Relationship |
| NFT 20 432 : 76 FD | Identical |
| NBN T 03 133 : 1980 | Identical |
| UNE 55612:1980 | Identical |
| UNE 55612:1980 | Not Equivalent |
| BS 6075-11:1981 | Methods of sampling and test for sodium hydroxide for industrial use Determination of mercury content (flameless atomic absorption method) |
| BS 6075-8:1981 | Methods of sampling and test for sodium hydroxide for industrial use Determination of sulphate content |
| BS 6075-10:1981 | Methods of sampling and test for sodium hydroxide for industrial use Determination of mercury content (photometric method) |
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