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罐采样/气相色谱-质谱法分析环境空气中57种臭氧前体物
Determination of 57 Ozone Precursors Compounds in Ambient Air Using Canister Sampling Followed by GC-MS
投稿时间:2018-05-11  修订日期:2018-08-30
DOI:10.19316/j.issn.1002-6002.2019.04.14
中文关键词:  低温浓缩  气相色谱-质谱法  57种臭氧前体物  环境空气
英文关键词:cryogenic traping  GC-MS  57 ozone precursors compounds  ambient air
基金项目:
作者单位
曹方方 山东大学环境与工程学院,山东济南250101
山东省环境监测中心,山东济南250101 
张凤菊 山东省环境监测中心,山东济南250101 
聂晓玲 山东大学环境与工程学院,山东济南250101 
李红莉 山东省环境监测中心,山东济南250101 
王艳 山东大学环境与工程学院,山东济南250101 
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中文摘要:
      针对中国当前臭氧污染问题,建立了苏玛罐采样-低温浓缩/气相色谱-质谱法分析环境空气中57种臭氧前体物的方法。样品经三级冷阱预浓缩仪富集、除干扰组分并进行冷聚焦后利用冷柱温分离,气相色谱-质谱法分析。笔者优化了阱的关键温度和时间参数,在最佳实验条件下进行方法性能实验,结果表明,57种目标化合物的方法检出限为0.03×10-6~0.39×10-6,高、中、低3组浓度水平的相对标准偏差(RSD)为0.5%~11%(n=6),空白加标回收率为80.1%~112%。方法成功应用于山东省17个采样城市环境空气样品的分析。
英文摘要:
      In order to analyze the cause of severe O3 pollution in China, this study proposed a method to determine 57 ozone precursors compounds in ambient air based on canister sampling-cryogenic traping/GC-MS. Samples were cryogenically preconcentrated and focused after interfering substances removed, then determined by GC-MS. In this paper, key temperature and time parameters of cold traps were optimised, experiment performances of the method were conducted under optimum conditions. The results showed that under the optimized conditions, the method detection limits of 57 compounds were between 0.03×10-6-0.39×10-6. The method showed high accuracy and validity, three levels of the relative standard (RSD) were in the range of 0.5%-11% (n=6), spiked sample recoveries were in the range of 80.1%-112%. This method was successfully used for the determination of ambient air samples in 17 citis of Shangdong province.
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