ISO 6923:2023

недоступно на русском языке

Опубликовано (Версия 1, 2023)

ISO 6923:2023

CHF 63

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Тезис

This document specifies a method for the quantitative determination of monomeric diisocyanate content in coating materials, adhesives and other liquid or pasty materials.

This method is suitable for the quantification of the following monomeric diisocyanates: methylene diphenyl diisocyanate (MDI, 2,4’-MDI and 4,4’-MDI), toluene diisocyanate (TDI, 2,6-TDI, 2,4-TDI), (cis/trans) isophorone diisocyanate (IPDI) and hexamethylene diisocyanate (HDI,1,6-HDI) in various matrices for concentrations ranging from 0,01 % to 2,0 % mass fraction. For higher concentrations, a suitable dilution before the derivatization with p-nitrobenzyl-N-propylamine (PNBPA) is performed. The measurements are carried out using ultra high performance liquid chromatography (UHPLC) with a multiple wavelength detector.

Общая информация

Текущий статус
: Опубликовано

Дата публикации
: 2023-09

Этап
: Опубликование международного стандарта [60.60]
Версия
: 1
Технический комитет :
ISO/TC 35/SC 16

ICS :
87.040
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