引用本文:张欢燕,陈晓婷,陆立群,宋钊,周守毅.液相色谱法测定环境空气中异氰酸酯类化合物[J].环境监控与预警,2021,13(4):22-25
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