ISO 3392:1976
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Cryolite, natural and artificial, and aluminium fluoride for industrial use — Determination of water content — Electrometric method
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
04-24-2019
English, French
09-01-1976
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Applies to the simultaneous determination of the loss of mass at 550 °C which is the sum of the masses of water that has not undergone any reaction and of the hydrogen fluoride formed by pyrohydrolysis and the mass of water released at 550 °C determined by the Karl-Fischer Method (direct electrometric titration). Makes reference to ISO 760. The difference between these two determinations is due to the formation of hydrogen fluoride by pyrohydrolysis (2 HF correspond to 1 H2 O). Calculation of the water content from the two results obtained. The diagram of the test apparatus is shown in a figure.
| DevelopmentNote |
Also numbered as BS 4993-5(1980) and BS 5050-9(1980). (07/2005)
|
| DocumentType |
Standard
|
| Pages |
5
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| Standards | Relationship |
| NBN T 03 443 : 1983 | Identical |
| BS 4993-1:1974 | Similar to |
| NFT 20 161 : 84 FD | Identical |
| BS 5050:1974 | Similar to |
| ISO/TR 4277:2009 | Cryolite, natural and artificial Conventional test for evaluation of free fluorides content |
| PD ISO/TR 4277:2009 | Cryolite, natural and artificial. Conventional test for evaluation of free fluorides content |
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