BS 4993-1:1974
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Methods of test for aluminium fluoride for industrial use Determination of fluorine content
Hardcopy , PDF
English
28-02-1974
22-05-2026
Cooperating organizations
Foreword
Method
1. Scope
2. Principle
3. Reagents
4. Apparatus
5. Procedure
6. Calculation
Figures
1. Typical form of steam distillation apparatus
for use in determination of fluorine content
Fusion of a test portion with sodium carbonate and separation of the fluorine by distillation with sulphuric acid. Titration of the distillate with thorium nitrate solution using either sodium alizarinsulphonate with or without methylene blue as masking agents, or methylthymol blue as indicator.
| Committee |
W/-
|
| DevelopmentNote |
Supersedes 71/53613 DC. (07/2005) Reviewed and confirmed by BSI, December 2011. (11/2011)
|
| DocumentType |
Standard
|
| Pages |
10
|
| PublisherName |
British Standards Institution
|
| Status |
Withdrawn
|
Withdrawn:This standard is no longer used
| Standards | Relationship |
| ISO 3391:1976 | Similar to |
| ISO 2362:1972 | Similar to |
| ISO 3392:1976 | Similar to |
This standard has been withdrawn and is no longer current. No replacement edition is available.
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