ISO 979:1974
Current
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Sodium hydroxide for industrial use — Method of assay
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01-12-1974
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Method for determination of the titre; this is expressed conventionally as percentages by mass of NaOH, a) as total alkalinity and b) as caustic alkalinity, corresponding to the total alkalinity less the alkalinity due to carbonates. The principle consists in titration of the total alkalinity with standard volumetric hydrochloric acid solution in the presence of methyl orange as indicator. Calculation of the two amounts a) and b). The mass of carbon dioxide is determined by the method specified in ISO 3196. This method has also been approved by the IUPAC. - Cancels and replaces ISO Recommendation R 979-1969 of which it constitutes a technical revision.
| Committee |
ISO/TC 47
|
| DevelopmentNote |
Also numbered as BS 6075-1(1981) (09/2005)
|
| DocumentType |
Standard
|
| Pages |
2
|
| PublisherName |
International Organization for Standardization
|
| Status |
Current
|
| Standards | Relationship |
| UNE 55601:1978 | Identical |
| NFT 20 422 : 76 FD | Identical |
| NBN T 03 121 : 1980 | Identical |
| PN ISO 979 : 2002 | Identical |
| BS 6075-11:1981 | Methods of sampling and test for sodium hydroxide for industrial use Determination of mercury content (flameless atomic absorption method) |
| I.S. EN 896:2012 | CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - SODIUM HYDROXIDE |
| 12/30257898 DC : 0 | BS EN 896 - CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - SODIUM HYDROXIDE |
| BS 6075-8:1981 | Methods of sampling and test for sodium hydroxide for industrial use Determination of sulphate content |
| DIN EN 896:2013-02 | CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - SODIUM HYDROXIDE |
| UNI EN 896 : 2013 | CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - SODIUM HYDROXIDE |
| BS 6075-9:1981 | Methods of sampling and test for sodium hydroxide for industrial use Determination of calcium and magnesium contents |
| BS 6075-10:1981 | Methods of sampling and test for sodium hydroxide for industrial use Determination of mercury content (photometric method) |
| BS EN 896:2012 | Chemicals used for treatment of water intended for human consumption. Sodium hydroxide |
| UNE-EN 896:2013 | Chemicals used for treatment of water intended for human consumption - Sodium hydroxide |
| EN 896:2012 | Chemicals used for treatment of water intended for human consumption - Sodium hydroxide |
| PREN 896 : DRAFT 2012 | CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - SODIUM HYDROXIDE |
| ISO 3195:1975 | Sodium hydroxide for industrial use — Sampling — Test Sample — Preparation of the main solution for carrying out certain determinations |
| ISO 3196:1975 | Sodium hydroxide for industrial use — Determination of carbonates content — Titrimetric method |
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