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SRPS ISO 2272:1993

Surface active agents — Soaps — Determination of low contents of free glycerol by molecular absorption spectrometry

Jul 28, 1993
Jul 28, 1993

General information

90.60     Sep 2, 2026

ISS

H091

International Standard

71.100.40  

Serbian  

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Scope

The determination is carried out in the following way: Decomposition of the soap by sulfuric acid and extraction of the fatty acida with light petroleum. Oxidation of the free glycerol remaining in the aqueous phase by periodic acid to formic acid and formaldehyde. On reaction with chromotropic acid, the aldehyde formed gives an absorbing compound whose absorbance is propotional to the free glycerol content. Spectrometric measurement of the absorbance at a wavelength about 571 mm.

Life cycle

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PUBLISHED
SRPS ISO 2272:1993
90.60 Close of review
Sep 2, 2026

Related project

Adopted from ISO 2272:1989