Norm

ISO 2272:1989 en

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

31,57

Over deze norm

Status Definitief
Aantal pagina's 3
Gepubliceerd op 29-06-1989
Taal Engels
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.

Details

ICS-code 71.100.40
Nederlandse titel Surface active agents - Soaps - Determination of low contents of free glycerol by molecular absorption spectrometry
Engelse titel Surface active agents - Soaps - Determination of low contents of free glycerol by molecular absorption spectrometry

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