ISO 17734-1:2026-工作场所空气用液相色谱和质谱法测定空气中的有机氮化合物第1部分:用二丁胺衍生物测定异氰酸酯-国家标准馆·国家数字标准馆

现行 ISO 17734-1:2026

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Workplace air — Determination of organonitrogen compounds in air using liquid chromatography and mass spectrometry — Part 1: Isocyanates using dibutylamine derivatives 工作场所空气用液相色谱和质谱法测定空气中的有机氮化合物第1部分:用二丁胺衍生物测定异氰酸酯

发布日期： 2026-05-20

                本文件规定了使用二正丁胺（DBA）衍生化和色谱分析测定工作场所空气中有机异氰酸酯的方法。
本文件适用于测定工作场所大气中气相和颗粒相中存在的多种有机异氰酸酯，包括单官能异氰酸酯，如异氰酸(ICA)、异氰酸甲酯(MIC)、异氰酸乙酯(EIC)、异氰酸丙酯(PIC)、异氰酸丁酯(BIC)和异氰酸苯酯(PhI)；单体二异氰酸酯，包括1, 6-六亚甲基二异氰酸酯(HDI)、2, 4-和2, 6-甲苯二异氰酸酯(TDI)、4, 4'-亚甲基二苯基二异氰酸酯(MDI)、1, 5-萘基二异氰酸酯(NDI)、异佛尔酮二异氰酸酯(IPDI)和4, 4'-二环己基甲烷二异氰酸酯(H12MDI)；和多官能异氰酸酯，包括低聚、预聚和聚合形式，例如缩二脲-、异氰脲酸酯-和脲基甲酸酯-加合物。
该方法包括使用冲击器、过滤器或其组合进行空气采样，以及通过液相色谱和质谱检测进行分析。
有用的分析范围为每个样品约2.5 ng至500ng异氰酸酯。对于15L的标称空气样品体积，这相当于大约0.2 μ g/m3至33 μ g/m3。这些值可以根据所分析的异氰酸酯而变化。
本文件不适用于胺或氨基异氰酸酯的测定。对于胺和氨基异氰酸酯的测定，ISO 17734-2[11]中规定的方法。

This document specifies a method for the determination of organic isocyanates in workplace air using derivatization with di-n-butylamine (DBA) and chromatographic analysis.
This document is applicable to the determination of a wide range of organic isocyanates present in both the gas phase and the particle phase in workplace atmospheres, including monofunctional isocyanates such as isocyanic acid (ICA), methyl isocyanate (MIC), ethyl isocyanate (EIC), propyl isocyanate (PIC), butyl isocyanate (BIC) and phenyl isocyanate (PhI); monomeric diisocyanates, including 1,6-hexamethylene diisocyanate (HDI), 2,4- and 2,6-toluene diisocyanate (TDI), 4,4′-methylenediphenyl diisocyanate (MDI), 1,5-naphthyl diisocyanate (NDI), isophorone diisocyanate (IPDI) and 4,4′-dicyclohexylmethane diisocyanate (H12MDI); and multifunctional isocyanates, including oligomeric, prepolymeric and polymeric forms such as biuret-, isocyanurate- and allophanate-adducts.
The method covers air sampling using impingers, filters or combinations thereof, and analysis by liquid chromatography with mass spectrometric detection.
The useful analytical range is approximately 2,5 ng to 500 ng of isocyanate per sample. For a nominal air sample volume of 15 l, this corresponds to approximately 0,2 μg/m3 to 33 μg/m3. These values can vary depending on the isocyanate analysed.
This document does not apply to the determination of amines or aminoisocyanates. For the determination of amines and aminoisocyanates, the method specified in ISO 17734-2[11].