ISO 2052:1976 PDF
Potassium chloride for industrial use — Determination of potassium content — Sodium tetraphenylborate titrimetric method
Potassium chloride for industrial use — Determination of potassium content — Sodium tetraphenylborate titrimetric method
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 4
- Дата публикации:
- 1 февраля 1976 г.
- Издание:
- ISO IS 2052 edition 1 version 1
- ICS:
- 71.060.50
The method is applicable to products having a minimum KCl content of about 95 % (m/m). The principle consists in dissolution of a test portion taken from the previously ground and sifted laboratory sample and elimination of many ammonium ions present. Precipitation of the potassium, in a slightly acid medium, by an excess of an standard volumetric sodium tetraphenylborate solution. Filtration and back-titration of this excess in the filtrate, with a standard volumetric solution of a quaternary ammonium salt, using bromphenol blue as indicator. Replaces ISO Recommendation R 2052-1971.
Технические детали
- Технический комитет
- ISO/TC 47 - Chemistry
- SKU
- ISO 2052:1976