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Norm

ISO 685:1975

Ausgabedatum: 1975 10 01

Analysis of soaps — Determination of total alkali content and total fatty matter content

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 w...
ZURÜCKGEZOGEN: 2020 02 28
Herausgeber:
International Organization for Standardization
Format:
Digital | 3 Seiten
Sprache:
Englisch
Aktuell Gültig:

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.

ISO 685:2020
2020 02 28
Analysis of soaps — Determination of total alkali content and total fatty matter content
Norm
ISO 685:1975
1975 10 01
Analysis of soaps — Determination of total alkali content and total fatty matter content
Norm
ISO/R 455:1965
1965 12 01
Withdrawal of ISO/R 455-1965
Technische Regel
Norm
ISO 685:2020
Ausgabedatum : 2020 02 28
Analysis of soaps — Determination of total alkali content and total fatty matter content