ISO 994:1973
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Potassium hydroxide for industrial use Determination of iron content 1,10- Phenanthroline photometric method
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
27-02-2019
English, French
01-04-1973
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Describes a method that is more sensitive and more widely used than the 2,2'-bipyridyl method. It is applicable to products having iron contents equal to or greater than 0.3 mg/kg. The principle is based on the reduction of iron(III) by hydroxylammonium chloride, formation of a iron(II)/1,10-phenanthroline complex in a buffered system. Photometric measurement of the coloured complex at a wavelength of about 510 nm. - Cancels and replaces ISO Recommendation R 994-1969.
| DocumentType |
Standard
|
| Pages |
2
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
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| Standards | Relationship |
| BS 5634:1978 | Similar to |
| NFT 20 373 : 77 FD | Identical |
| NBN T 03 190 : 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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