BS 2690-104:1983
Current
The latest, up-to-date edition.
Methods of testing water used in industry Silica: reactive, total and suspended
Hardcopy , PDF
English
30-11-1983
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0. Introduction
1. Scope
Section 104.1 Reactive silica: spectrophotometric
method (reduced molybdosilicic acid)
2. Range
3. Maximum size of test portion
4. Principle
5. Interferences
6. Reagents
7. Apparatus
8. Sampling
9. Calibration
10. Procedure
11. Calculation
Section 104.2 Total silica: fusion and spectrophotometry
12. Range
13. Maximum size of test portion
14. Principle
15. Interferences
16. Reagents
17. Apparatus
18. Sampling
19. Calibration
20. Procedure
21. Calculation
Section 104.3 Suspended silica: filtration, fusion and
spectrophotometry
22. Range
23. Maximum size of test portion
24. Principle
25. Interferences
26. Reagents
27. Apparatus
28. Sampling
29. Calibration
30. Procedure
31. Calculation
Reactive silica by formation of molybdosilicic acid, reduction to molybdenum blue and spectrophotometric measurement. Applicable to up to 50 μg of SiO2 in up to 100 ml. Total silica by prior fusion to reactive silica. Applicable to up to 50 μg of SiO2 in up to 50 ml. Suspended silica by prior filtration and fusion. Applicable to up to 50 μg of SiO2 in up to 1 L.
| Committee |
EH/3
|
| DevelopmentNote |
Supersedes BS 2690(1956) (07/2004) Supersedes 77/50234 DC (06/2005) Reviewed and confirmed by BSI, November 2012. (10/2012)
|
| DocumentType |
Standard
|
| Pages |
12
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
The methods described are for the determination, in industrial waters, of reactive silica (spectrophotometry — reduced molybdosilicic acid), total silica (fusion and spectrophotometry) and suspended silica (filtration, fusion and spectrophotometry).
Section 104.1 Reactive silica: spectrophotometric method (reduced molybdosilicic acid)
| Standards | Relationship |
| UNE-EN 60953-2:1995 | Identical |
| DEFSTAN 68-253/2(2005) : 2005 | FLUIDS, AVIATION, THRUST AUGMENTATION NATO CODE: S-1744 AND S-1739 JOINT SERVICE DESIGNATION: AL-28 AND WTA |
| BS 1427:1993 | Guide to field and on-site test methods for the analysis of waters |
| BS 1427:2009 | Guide to on-site test methods for the analysis of waters |
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