液相色谱法测定环境空气中异氰酸酯类化合物

张欢燕; 陈晓婷; 陆立群; 宋钊; 周守毅

引用本文:	ZHANG Huan-yan, CHEN Xiao-ting, LU Li-qun, SONG Zhao, ZHOU Shou-yi.Determination of Isocyanate Compounds in Atmosphere Using Liquid Chromatography[J].Environmental Monitoring and Forewarning,2021,13(4):22~25

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液相色谱法测定环境空气中异氰酸酯类化合物
张欢燕，陈晓婷，陆立群，宋钊，周守毅
上海市环境监测中心，上海 200030

摘要:

根据异氰酸酯的结构特性，采用涂覆有1-(2-吡啶)哌嗪衍生物的浸渍滤膜，采集环境空气样品。优化了采集方法和色谱条件，建立了基于液相色谱法测定空气中2,4-甲苯二异氰酸酯（2,4-TDI）、2,6-甲苯二异氰酸酯（2,6-TDI）、六亚甲基二异氰酸酯（HDI）和二苯基甲烷二异氰酸酯（MDI）4种异氰酸酯类化合物的检测方法。结果表明，在质量浓度为0.01~5.00 mg/L的范围内，标准曲线相关系数达到0.999 9。按采集空气样品15.0 L计算，最低检出限为0.8~1.0 μg/m³，测定下限为3.2 ~4.0μg/m³，相对标准偏差为0.7 %~6.8 %，加标回收率为85.3 %~101 %。该方法可同时测定空气中的多种异氰酸酯类化合物，线性范围广，检出限较低，精密度和准确度均能满足测试要求。

关键词: 异氰酸酯类化合物 1-(2-吡啶)哌嗪液相色谱法环境空气

DOI：

分类号:X831;O657.7⁺²

基金项目:科技部国家重点研发计划资助项目（2016YFC0200104)

Determination of Isocyanate Compounds in Atmosphere Using Liquid Chromatography

ZHANG Huan-yan, CHEN Xiao-ting, LU Li-qun, SONG Zhao, ZHOU Shou-yi

Shanghai Environmental Monitoring Center, Shanghai 200030,China

Abstract:

According to the structure characteristics of isocyanate, an impregnation filter membrane coated with 1-(2-pyridine) piperazine (1-2PP) derivative agent was used to collect ambient air samples. The chromatographic conditions and acquisition methods were optimized, and a liquid chromatography method for the determination of four isocyanates, toluene diisocyanate with two isomers (2,4-TDI and 2,6-TDI), hexamethylene diisocyanate (HDI) and diphenyl methane diisocyanate (MDI) in atmosphere was established. Under the optimized conditions, the linear ranges of the standard curve were 0.01～5.00 mg/L with the correlation coefficients not less than 0.999 9. The minimum detection limits were 0.8～1.0μg/m³ and limit of quantification were 3.2～4.0 μg/m³ based on 15.0 L air sample. The relative standard deviations ranged of 0.7 %～6.8 %, and the recoveries were in the range of 85.3 %～101 %. This method can be used for simultaneous determination of a variety of isocyanates in the air with a wide linear range and a low detection limit. The precision and accuracy can meet the test requirements.

Key words: Isocyanates 1-(2-Pyridyl)piperazine HPLC Ambient air