ISO 3194:1975
Withdrawn
Potassium hydroxide for industrial use — Determination of sulphur compounds — Method by reduction and titrimetry
Hardcopy , PDF
English, French
08-01-1975
04-18-2019
Applicable to products the content of which, expressed as sulphate, is equal or more than 5 mg/kg. The principle consists in the reduction of the sulphur compounds to hydrogen sulphide by heating with a mixture of hydriodic acid and hypophosphorous acid. Distillation of the hydrogen sulphide by a current of purified oxygen-free nitrogen in a mixture of sodium hydroxide and acetone. Titration of the sulphide with standard volumetric mercury(II) nitrate solution in the presence of dithizone as indicator.
| Committee |
ISO/TC 47
|
| DocumentType |
Standard
|
| Pages |
6
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| Standards | Relationship |
| BS 5634:1978 | Similar to |
| NFT 20 387 : 77 FD | Identical |
| NBN T 03 198 : 1980 | Identical |
| 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 |
| BS EN 60993:2002 | Electrolyte for vented nickel-cadmium cells |
| IEC 60993:1989 | Electrolyte for vented nickel-cadmium cells |
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