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ISO 2268:1972

Surface active agents (non-ionic) — Determination of polyethylene glycols and non-ionic active matter (adducts) — Weibull method
1. 11. 1972.

Опште информације

90.20     15. 4. 2026.

ISO

ISO/TC 91

Međunarodni standard

71.100.40  

francuski   engleski  

Kupovina

Objavljen

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Apstrakt

The method relies on the facts that both non-ionic adducts and polyethylene glycols are soluble in sodium chloride solution, but one is soluble in ethyl acetate whereas the other is not. Separation of the polyethylene glycols and the adducts is, therefore, possible by the following methods: Dissolution of the sample in ethyl acetate and extraction of polyethylene glycols by sodium chloride solution. Extraction of the polyethylene glycols isolated in the sodium chloride solution with chloroform, removal of the solvent and weighing of the residue. Evaporation of the ethyl acetate solution which contains the adducts and weighing of the residue.

Životni ciklus

TRENUTNO

OBJAVLJEN
ISO 2268:1972
90.20 Početak postupka preispitivanja standarda
15. 4. 2026.

REVIDIRAN OD

NAPUŠTEN
ISO/CD 2268

Nacionalna preuzimanja

SRPS ISO 2268:1996  
ISS

Površinski aktivne materije (nejonske)- Određivanje polietilenglikola i nejonskih aktivnih materija (adukata) - Metoda po Vajbulu (identičan sa ISO 2268:1972)

90.20   Početak postupka preispitivanja standarda

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