ISO 990:1973
Withdrawn
Potassium hydroxide for industrial use — Method of assay
Hardcopy , PDF
English, French
04-01-1973
02-26-2019
Method for determination of the titre, conventionally expressed as percentages by mass of KOH. There are three ways: a) total alkalinity, b) caustic alkalinity corresponding to the total alkalinity less the alkalinity due to carbonates and c) actual potassium hydroxide corresponding to the total alkalinity less the alkalinity due to carbonates and any hydroxide which may be present. The principle consists in titration of the total alkalinity with standard volumetric hydrochloric acid solution in the presence of methyl orange as indicator. Calculation of the three amounts a), b), and c). - Replaces ISO Recommendation R 990-1969.
| Committee |
ISO/TC 47
|
| DocumentType |
Standard
|
| Pages |
2
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| Standards | Relationship |
| NFT 20 380 : 77 FD | Identical |
| NBN T 03 186 : 1980 | Identical |
| BS 5634:1978 | Corresponds |
| NBN T 03 186 : 1980 | Similar to |
| NFT 20 380 : 77 FD | Similar to |
| I.S. EN 60993:2002 | ELECTROLYTE FOR VENTED NICKEL-CADMIUM CELLS |
| EN 60993:2002 | Electrolyte for vented nickel-cadmium cells |
| CEI EN 60993 : 2004 | ELECTROLYTE FOR VENTED NICKEL-CADMIUM CELLS |
| IEC 60993:1989 | Electrolyte for vented nickel-cadmium cells |
| BS EN 60993:2002 | Electrolyte for vented nickel-cadmium cells |
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