ISO 994:1973
Withdrawn
Potassium hydroxide for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method
Hardcopy , PDF
English, French
04-01-1973
02-27-2019
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.
| Committee |
ISO/TC 47
|
| DocumentType |
Standard
|
| Pages |
2
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| 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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