ISO 994:1973 PDF
Potassium hydroxide for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method
Название (английский):
ISO 994:1973
Potassium hydroxide for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 2
- Дата публикации:
- 1 апреля 1973 г.
- Издание:
- ISO IS 994 edition 1 version 1
- ICS:
- 71.060.40
Описание (английский):
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.
Технические детали
- Технический комитет
- ISO/TC 47 - Chemistry
- SKU
- ISO 994:1973