ISO 3198:1975
Withdrawn
Sodium hydroxide for industrial use — Determination of sulphur compounds — Method by reduction and titrimetry
Hardcopy , PDF
English, French
08-01-1975
04-24-2019
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 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
|
| DevelopmentNote |
Also numbered as BS 6075-8(1981) (09/2005)
|
| DocumentType |
Standard
|
| Pages |
6
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| Standards | Relationship |
| NBN T 03 132 : 1980 | Identical |
| NFT 20 428 : 76 FD | Identical |
| UNE 55606:1978 | Identical |
| UNE 55606:1978 | Not Equivalent |
| BS 6075-11:1981 | Methods of sampling and test for sodium hydroxide for industrial use Determination of mercury content (flameless atomic absorption method) |
| BS 6075-9:1981 | Methods of sampling and test for sodium hydroxide for industrial use Determination of calcium and magnesium contents |
| BS 6075-10:1981 | Methods of sampling and test for sodium hydroxide for industrial use Determination of mercury content (photometric method) |
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