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ISO 2272:1989

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

Jun 29, 1989

General information

90.20     Apr 15, 2026

ISO

ISO/TC 91

International Standard

71.100.40  

French   English  

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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

PREVIOUSLY

WITHDRAWN
ISO 2272:1972

NOW

PUBLISHED
ISO 2272:1989
90.20 Standard under periodical review
Apr 15, 2026

National adoptions

SRPS ISO 2272:1993  
ISS

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

90.20   Standard under periodical review

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