BS 4258-4:1975
Current
The latest, up-to-date edition.
Methods of test for phosphoric acid (orthophosphoric acid) for industrial use Determination of fluorine content
Hardcopy , PDF
English
30-01-1976
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Cooperating organizations
Foreword
Methods of test
1. Scope and field of application
2. References
3. Principle
4. Reagents
5. Apparatus
6. Procedure
7. Expression of results
8. Test report
Figure
1. Suitable distillation apparatus
Photometric method applicable to fluorine levels of 10 mg/kg and higher.
| Committee |
CII/37
|
| DevelopmentNote |
Supersedes 74/50321 DC (08/2005) Reviewed and confirmed by BSI, December 2012. (11/2012)
|
| DocumentType |
Standard
|
| Pages |
10
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This Part of BS 4258 specifies an alizarin complexone and lanthanum (III) nitrate photometric method for the determination of the fluorine content of orthophosphoric acid for industrial and food uses.
The method is applicable to products whose fluorine (F) content is equal to or greater than 10 mg/kg.
| Standards | Relationship |
| ISO 3360:1976 | Similar to |
| BS 4258-10:1978 | Methods of test for phosphoric acid (orthophosphoric acid) for industrial use Determination of oxides of nitrogen content |
| BS 4258-9:1978 | Methods of test for phosphoric acid (orthophosphoric acid) for industrial use Determination of chloride content |
| BS 4258-12:1982 | Methods of test for phosphoric acid (orthophosphoric acid) for industrial use Guide to sampling techniques |
| BS 4258-6:1976 | Methods of test for phosphoric acid (orthophosphoric acid) for industrial use Determination of arsenic content |
| BS 4258-7:1978 | Methods of test for phosphoric acid (orthophosphoric acid) for industrial use Determination of total phosphorus (V) oxide content: quinoline phosphomolybdate gravimetric method |
| BS 4258-8:1978 | Methods of test for phosphoric acid (orthophosphoric acid) for industrial use Determination of calcium content (flame atomic absorption method) |
| BS 3978:1966 | Specification for water for laboratory use |
| BS 1792:1960 | One-mark volumetric flasks |
| BS 4427-9:1975 | Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use Determination of fluorine content |
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