BS 4993-3:1974
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.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 silica content
Hardcopy , PDF
English
28-02-1974
22-05-2026
Cooperating organizations
Foreword
Method
1. Scope
2. Field of application
3. Principle
4. Reagents
5. Apparatus
6. Procedure
7. Calculation
Fusion of a test portion with sodium carbonate/boric acid, dissolution of the melt in nitric acid, formation of the yellow (oxidized) silico-molybdic complex, reduction to the blue form and spectrophotometric measurement at 815 nm.
| 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Withdrawn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Withdrawn:This standard is no longer used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 2369:1972 | Similar to |
| UNE-EN ISO 15187:2003 | Identical |
| BS 4993-5:1980 | Methods of test for aluminium fluoride for industrial use Determination of moisture content (Karl Fischer method) |
| BS 4993-9:1980 | Methods of test for aluminium fluoride for industrial use Determination of sulphur content (X-ray fluorescence spectrometric method) |
| BS 5050-11(1980) : 1980 | METHODS OF TEST FOR CRYOLITE - DETERMINATION OF SULPHATE CONTENT |
| BS 5050-9(1980) : 1980 | METHODS OF TEST FOR CRYOLITE - DETERMINATION OF MOISTURE CONTENT (KARL FISHER METHOD) |
| BS 4993-7:1980 | Methods of test for aluminium fluoride for industrial use Determination of sodium content |
| BS 4993-8:1980 | Methods of test for aluminium fluoride for industrial use Determination of sulphate content |
| BS 5050-13(1983) : 1983 | METHODS OF TEST FOR CRYOLITE - DETERMINATION OF PHOSPHORUS CONTENT |
| BS 5050-10(1980) : 1980 | METHODS OF TEST FOR CRYOLITE - DETERMINATION OF MOISTURE CONTENT (GRAVIMETRIC METHOD) |
| BS 5050-12(1980) : 1980 | METHODS OF TEST FOR CRYOLITE - DETERMINATION OF SULFUR CONTENT (X-RAY FLUORESCENCE SPECTROMETRIC METHOD) |
| BS 4993-10:1983 | Methods of test for aluminium fluoride for industrial use Determination of phosphorus content |
| BS 6337-2:1983 | General methods of chemical analysis Method for determination of silicon content (reduced molybdosilicate spectrophotometric method) |
| BS 4993-6:1980 | Methods of test for aluminium fluoride for industrial use Determination of moisture content (gravimetric method) |
| BS 3145:1978 | Specification for laboratory pH meters |
| BS 2586:1979 | Specification for glass and reference electrodes for the measurement of pH |
| BS 3422(1961) : LATEST | LABORATORY DEFLECTION pH METERS |
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