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- W4233284973 abstract "This method, unlike method No. 1 Polyisocyanates [1], deals only with polyisocyanates made fom aromatic diisocyanates or from mixtures including aromatic diisocyanates. The polyisocyanate-containing substances present at the workplace as an aerosol are drawn with a sampling pump into an adsorption tube containing glass wool impregnated with a secondary amine as derivatisation reagent. The free isocyanate groups of the polyisocyanates react immediately on contact with the reagent to form soluble urea derivatives. Immediately after sampling these are eluted together with the deposited aerosol in a countercurrent dichloromethane. During this process, any remaining free isocyanate groups also react rapidly to form urea derivatives in the homogeneous phase. The urea derivatives are analysed in a high performance liquid chromatograph equipped with a UV detector." @default.
- W4233284973 created "2022-05-12" @default.
- W4233284973 creator A5065378054 @default.
- W4233284973 date "2002-04-11" @default.
- W4233284973 modified "2023-09-23" @default.
- W4233284973 title "Polyisocyanates" @default.
- W4233284973 doi "https://doi.org/10.1002/352760023x.ch8" @default.
- W4233284973 hasPublicationYear "2002" @default.
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