ISO 3194:1975 PDF
Potassium hydroxide for industrial use — Determination of sulphur compounds — Method by reduction and titrimetry
Название (английский):
ISO 3194:1975
Potassium hydroxide for industrial use — Determination of sulphur compounds — Method by reduction and titrimetry
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 6
- Дата публикации:
- 1 августа 1975 г.
- Издание:
- ISO IS 3194 edition 1 version 1
- ICS:
- 71.060.40
Описание (английский):
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 purified 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.
Технические детали
- Технический комитет
- ISO/TC 47 - Chemistry
- SKU
- ISO 3194:1975