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ISO 2272:1989

Surface active agents — Soaps — Determination of low contents of free glycerol by molecular absorption spectrometry
29. 6. 1989.

Опште информације

90.60     3. 9. 2026.

ISO

ISO/TC 91

Međunarodni standard

71.100.40  

francuski   engleski  

Kupovina

Objavljen

Jezik na kome želite da primite dokument.

Apstrakt

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.

Životni ciklus

PRETHODNO

POVUČEN
ISO 2272:1972

TRENUTNO

OBJAVLJEN
ISO 2272:1989
90.60 Završetak postupka preispitivanja standarda
3. 9. 2026.

Nacionalna preuzimanja

SRPS ISO 2272:1993  
ISS

Površinski aktivne materije - Sapuni - Određivanje niskih sadržaja slobodnog glicerina molekularnom apsorpcionom spektrometrijom (identičan sa ISO 2272:1989)

90.60   Završetak postupka preispitivanja standarda

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