ISO 3177:1975 PDF
Potassium hydroxide for industrial use — Determination of chlorides content — Photometric method
Название (английский):
ISO 3177:1975
Potassium hydroxide for industrial use — Determination of chlorides content — Photometric method
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 3
- Дата публикации:
- 1 марта 1975 г.
- Издание:
- ISO IS 3177 edition 1 version 1
- ICS:
- 71.060.40
Описание (английский):
Applicable to products having contents, expressed as chlorine, between 2 mg/kg and 50 mg/kg. For contents exceeding 50mg/kg the method specified in ISO 992 shall be used. The principle consists in quantitative displacement of the thiocyanate (SCN- ) ions of the mercury(II) thiocyanate by the cloride (Cl- ) ions contained in the test portion. Reaction of the thiocyanate ions with iron(III) nitrate to form iron(III) thiocyanate (red). Photometric measurement of the colour at a wavelength of about 450 nm.
Технические детали
- Технический комитет
- ISO/TC 47 - Chemistry
- SKU
- ISO 3177:1975