Determination of Halogenated Greenhouse Gases in Ambient Air by Preconcentration/Gas Chromatography－Mass Spectrometry with Electron Capture Detector

HE Hui; HUANG Zhong-hui; HUANG Zhong-kun; XIE Dan-ping; LIU Wang

doi:10.19969/j.fxcsxb.23011001

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Determination of Halogenated Greenhouse Gases in Ambient Air by Preconcentration/Gas Chromatography－Mass Spectrometry with Electron Capture Detector

Scientific Papers | 更新时间：2023-04-18

- Determination of Halogenated Greenhouse Gases in Ambient Air by Preconcentration/Gas Chromatography－Mass Spectrometry with Electron Capture Detector
- Journal of Instrumental Analysis Vol. 42, Issue 4, Pages: 432-438(2023)
- 作者机构：
  
  生态环境部华南环境科学研究所广东省水与大气污染防治重点实验室，广东广州 510665
- 作者简介：
- 基金信息：
- DOI：10.19969/j.fxcsxb.23011001
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贺辉,黄忠辉,黄钟坤等.预浓缩－气相色谱－质谱/电子捕获检测器测定环境空气中的卤代温室气体[J].分析测试学报,2023,42(04):432-438.

HE Hui,HUANG Zhong-hui,HUANG Zhong-kun,et al.Determination of Halogenated Greenhouse Gases in Ambient Air by Preconcentration/Gas Chromatography－Mass Spectrometry with Electron Capture Detector[J].Journal of Instrumental Analysis,2023,42(04):432-438.
贺辉,黄忠辉,黄钟坤等.预浓缩－气相色谱－质谱/电子捕获检测器测定环境空气中的卤代温室气体[J].分析测试学报,2023,42(04):432-438. DOI： 10.19969/j.fxcsxb.23011001.

HE Hui,HUANG Zhong-hui,HUANG Zhong-kun,et al.Determination of Halogenated Greenhouse Gases in Ambient Air by Preconcentration/Gas Chromatography－Mass Spectrometry with Electron Capture Detector[J].Journal of Instrumental Analysis,2023,42(04):432-438. DOI： 10.19969/j.fxcsxb.23011001.

摘要

卤代温室气体（HGHGs）全球增温趋势极高，具有很强的温室效应，但其在环境空气中的浓度极低，因此准确测定环境空气中HGHGs是一项极具挑战性的工作。该文基于预浓缩－气相色谱－质谱/电子捕获检测器（GC－MS/ECD）建立了适用于环境空气中32种HGHGs的检测方法。分别考察了捕集流量、冷阱温度和电子捕获检测器温度对目标组分响应的影响，得到最优分析条件。采用优化后的条件对32种HGHGs进行方法验证，结果表明，32种HGHGs在20 ~ 800 pmol/mol范围内线性良好，相关系数（,r,）均大于0.99。方法检出限为0.21 ~ 1.17 pmol/mol，定量下限为0.84 ~ 4.68 pmol/mol，加标回收率为92.5% ~ 104%，相对标准偏差（RSD）为0.50% ~ 6.4%。该方法能够满足环境空气中HGHGs的监测需求，为大气中HGHGs的履约监测提供了一种可靠的技术手段。

Abstract

Halogenated greenhouse gases（HGHGs） have a strong greenhouse effect due to their high global warming potential．However，the mixing ratios of ambient HGHGs are very low，and it is a challenge to accurately determine HGHGs in ambient air．A preconcentration gas chromatography－mass spectrometry with electron capture detector system（GC－MS/ECD） was established for the determination of 32 HGHGs in ambient air in this paper．The influences of capture flow，cold trap temperature and ECD temperature were investigated to obtain the optimal analysis conditions．Method validation experiments were carried out through the determination of 32 HGHGs．The results showed that good linear relationships in the range of 20－800 pmol/mol were obtained，and the correlation coefficients（,r,） for the 32 HGHGs were greater than 0.99．The method detection limits ranged from 0.21 pmol/mol to 1.17 pmol/mol，and the quantitation limits ranged from 0.84 pmol/mol to 4.68 pmol/mol．The spiked recoveries ranged from 92.5% to 104%，with relative standard deviations （RSDs） of 0.50%－6.4%．This method could satisfy the requirements for monitoring the HGHGs in ambient air，and it provides a reliable means for the analysis of HGHGs in ambient air.

关键词

卤代温室气体预浓缩气相色谱－质谱联用法气相色谱－电子捕获检测法环境空气

Keywords

halogenated greenhouse gasespreconcentrationgas chromatography－mass spectrometrygas chromatography－electron capture detectorambient air

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暨南大学环境与气候研究院

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广东第二师范学院生物与食品工程学院

新疆大学化学化工学院

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