ISO 3138:1974
Withdrawn
Anhydrous hydrogen fluoride for industrial use — Determination of non-volatile acid content — Titrimetric method
Hardcopy , PDF
English, French
12-01-1974
04-11-2019
Applicable to contents of between 0.005 % (m/m) and 0.3 % (m/m) expressed in sulphuric acid. Preparation of the samples according to ISO 3137. Removal of volatile acids by evaporation and titration of the remaining acidity with standard volumetric sodium hydroxide solution in the presence of phenolphthalein as indicator. The evaporation is carried out on a boiling water bath in a fume cupboard.
| Committee |
ISO/TC 47
|
| DocumentType |
Standard
|
| Pages |
2
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| Standards | Relationship |
| BS 5365-2:1976 | Identical |
| NFT 20 331 : 84 FD | Identical |
| NBN T 03 512 : 1983 | Identical |
| ISO 3700:1980 | Anhydrous hydrogen fluoride for industrial use — Determination of water content — Conductimetric method |
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