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Standard

ISO 685:1975

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Hinweis: Neuste Ausgabe: ISO 685:2020

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Zusammenfassung

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.

Produktspezifikationen

  • Standard von ISO
  • Ausgabedatum:
  • Rückzugsdatum:
  • Edition: 1
  • Dokumenttyp: IS
  • Seiten
  • Herausgeber: ISO
  • Lieferant: ISO
  • ICS: 71.100.40
  • Internationales Komitee: ISO/TC 91

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