Standard

NS-EN ISO 6923:2024

Jun 2024 Published

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Abstract

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.

Document information

Standard from SN
Published: 24 June 2024
Edition: 2024-06
Version: 1
Document type: NAT
ISBN:

ICS 87.040
National Committee SN/K 51
National Committee SN/K 51

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Adopted from: EN ISO 6923:2024 , 0

NS-EN ISO 6923:2024

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Abstract

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