ISO 2833:1973
Current
The latest, up-to-date edition.
Sodium fluoride for industrial use — Determination of fluorine content — Modified Willard-Winter method
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
English, French
01-12-1973
Important note : Users cannot be edited or removed once added to your Multi user PDF.
The principle consists in separation of the fluorine from a test portion by distillation with sulphuric acid or perchloric acid. Titration with thorium nitrate solution using sodium alizarinsuphonate and methylene blue as indicators. Alternatively the thorium nitrate titration may be carried out using sodium alizarinsuphonate alone as indicator, the end-point being determined spectrophotometrically under carefully defined conditions. The absorbance at a wavelength of 525 nm shall reach the arbitrary value of 0.6. Has also been approved by the IUPAC.
| Committee |
ISO/TC 47
|
| DocumentType |
Standard
|
| Pages |
5
|
| PublisherName |
International Organization for Standardization
|
| Status |
Current
|
| Standards | Relationship |
| NFT 20 151 : 84 FD | Identical |
| NBN T 03 463 : 1983 | Identical |
| PN ISO 2833 : 1998 | Identical |
| BS 5072-3:1975 | Similar to |
| EN 12173:2012 | Chemicals used for treatment of water intended for human consumption - Sodium fluoride |
| DIN EN 12173:2013-01 | CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - SODIUM FLUORIDE |
| I.S. EN 12173:2012 | CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - SODIUM FLUORIDE |
| 12/30258194 DC : 0 | BS EN 12173 - CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - SODIUM FLUORIDE |
| UNI EN 12173 : 2013 | CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - SODIUM FLUORIDE |
| PREN 12173 : DRAFT 2012 | CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - SODIUM FLUORIDE |
| UNE-EN 12173:2013 | Chemicals used for treatment of water intended for human consumption - Sodium fluoride |
| BS EN 12173:2012 | Chemicals used for treatment of water intended for human consumption. Sodium fluoride |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.