Aktivní norma | Vydána: 22.06.2023

ISO 14897:2023-ed.3.0

Plastics — Polyols for use in the production of polyurethanes — Determination of water content
(Plastiques — Polyols destinés a la production de polyuréthanes — Dosage de l´eau)

Dostupné jazyky: Anglicky

Dostupné provedení: Elektronické PDF, Tištěné

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Podrobné informace

Označení: ISO 14897:2023-ed.3.0

Datum vydání: 22.06.2023

Stran: 10

Země: Mezinárodní technická norma

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Anotace

Description / Abstract: This document specifies methods used to measure the water content of polyols employed as polyurethane raw materials. Method A is a manual amperometric method which has been included to better define the principles of the Karl Fischer measurement. Amperometric methods are applicable to a wide range of polyols, including those which have enough colour to obscure a visual end-point. Method B includes an automated amperometric procedure and an automated coulometric procedure. The coulometric procedure is an absolute method that does not require calibration and gives improved sensitivity compared with amperometric methods.

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