ISO 2272:1989
Surface active agents; soaps; determination of low contents of free glycerol by molecular absorption spectrometry
- Standard No.
- ISO 2272:1989
- Release Date
- 1989
- Published By
- International Organization for Standardization (ISO)
- Latest
- ISO 2272:1989
- 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.
ISO 2272:1989 history
- 1989 ISO 2272:1989 Surface active agents; soaps; determination of low contents of free glycerol by molecular absorption spectrometry
- 1972 ISO 2272:1972 Surface active agents — Analysis of soaps — Determination of low contents of free glycerol spectrophotometric method
