ISO 685:1975 PDF
Analysis of soaps — Determination of total alkali content and total fatty matter content
Analysis of soaps — Determination of total alkali content and total fatty matter content
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 3
- Дата публикации:
- 1 октября 1975 г.
- Издание:
- ISO IS 685 edition 1 version 1
- ICS:
- 71.100.40
The method consists in decomposition of the soap by a known volume of standard volumetric mineral acid solution, extraction and separation of the liberated fatty matter with light petroleum and determination of a total alkali content by titration of the excess of acid contained in the aqueous phase with a standard volumetric sodium hydroxide solution. After evaporation of the light petroleum from the extract, dissolution of the residue in ethanol and neutralization of the fatty acids with a standard volumetric potassium hydroxide solution. Evaporation of the ethanol and weighing of the soap formed to determine the total fatty matter content.
Технические детали
- Технический комитет
- ISO/TC 91 - Surface active agents
- SKU
- ISO 685:1975
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