色漆和清漆 涂料和类似产品中单体二异氰酸酯含量的测定 采用高效液相色谱紫外检测器（HPLC-UV

[中文适用范围]： 本文件规定了涂料、粘合剂和其他液体或糊状材料中单体二异氰酸酯含量的定量测定方法。该方法适用于以下单体二异氰酸酯的定量测定：二苯基甲烷二异氰酸酯 (MDI、2,4'-MDI 和 4,4'-MDI)、甲苯二异氰酸酯 (TDI、2,6-TDI、2,4-TDI)、(顺式/反式) 异佛尔酮二异氰酸酯 (IPDI) 和六亚甲基二异氰酸酯 (HDI、1,6-HDI)，浓度范围为 0.01% 至 2.0% 质量分数。对于更高的浓度，在用对硝基苄基-N-丙胺 (PNBPA) 衍生化之前进行适当的稀释。使用带有多波长检测器的超高效液相色谱 (UHPLC) 进行测量。 [外文原描述]： 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.