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

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English, French

Published date

06-29-1989

Publisher

International Organization for Standardization

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.

DocumentType	Standard
Pages	3
PublisherName	International Organization for Standardization
Status	Current
Supersedes	ISO 2272:1972

Standards	Relationship
NBN ISO 2272 : 1990	Identical
NF ISO 2272 : 1989	Identical
UNE 55905:1991	Identical
NFT 60 311 : 1972	Identical

BS 1715-2.8:1989	Analysis of soaps. Quantitative test methods Method for determination of glycerol content
BIS IS/ISO 1066 : 1975	ANALYSIS OF SOAPS - DETERMINATION OF GLYCEROL CONTENT - TITRIMETRIC METHOD
ISO 1066:1975	Analysis of soaps Determination of glycerol content Titrimetric method