便携式气相色谱-质谱联用现场检测土壤中挥发性有机污染物
Onsite Detection of Volatile Organic Pollutants in Soil Samples by Portable Gas Chromatography-Mass Spectrometry
陈伟妮 1刘旋 2胡斌2
作者信息
- 1. 揭阳职业技术学院化学工程系,揭阳 522000
- 2. 暨南大学环境与气候学院,质谱仪器与大气环境研究所,广州 510632
- 折叠
摘要
土壤中挥发性有机污染物(VOCs)的监测对生态环境、人体健康、农业生产以及土地使用至关重要.本研究基于固相微萃取结合便携式气相色谱-质谱联用技术(SPME-PGC-MS)建立了一种土壤中VOCs的现场分析方法,并将其用于土壤中的典型VOCs的测定,以考察和优化方法的稳定性、灵敏度和定量检测等分析性能.结果表明,方法的线性检测范围为5.0～100 μg/L(R2>0.99),检出限(S/N=3)和定量限(S/N=10)分别为2.81～3.89 μg/L和9.37～12.97 μg/L,相对标准偏差为4.79%～7.53%.采用本方法现场测定了不同土壤中的VOCs,发现土壤中有多种与土地使用和作业相关的VOCs.本研究开发的SPME-PGC-MS技术能够快速测定土壤中的VOCs,为复杂环境条件下污染物的现场分析提供了新方法.
Abstract
Rapid detection of organic volatile compounds(VOCs)in soil is crucial for evaluating soil safety in different aspects including ecological environment,human health,and agricultural application.In this study,a portable analytical approach was developed for onsite detection of VOCs in soil by headspace solid phase microextraction coupled with portable gas chromatography-mass spectrometry(SPME-PGC-MS).Several typical VOCs including heptane,benzene,toluene,ethylbenzene and bromobenzene were used to investigate and optimize the choice of SPME fiber,and it was found that the polydimethylsiloxane/divinyl benzene(PDMS/DVB)SPME fiber had the best enrichment effect.Furthermore,well-acceptable analytical performances including stability,sensitivity and quantitative detection of SPME-PGC-MS were obtained for detecting five typical VOCs.The relative standard deviations of the method were 4.79%-7.53%for parallel measurements(n=6),the limits of detection(LODs)and limits of quantification(LOQs)were found to be 2.81-3.89 μg/L and 9.37-12.97 μg/L,respectively,and the linear ranges of five VOCs were 5.0-100 μg/L with excellent correlation coefficient(R2>0.99).Furthermore,the presented SPME-PGC-MS method was successfully used for on-site detection of various VOCs from different real soil samples,showing that a variety of VOCs such as benzene,n-heptane,toluene,chlorobenzene and ethylbenzene were mainly generated from industrial pollution.The developed SPME-PGC-MS was a promising portable approach for onsite screening of VOCs in the soil in different applications.
关键词
土壤污染/有毒挥发性有机物/便携式气相色谱-质谱/固相微萃取/现场分析Key words
Soil contamination/Toxic volatile organic compounds/Portable gas chromatography-mass spectrometry/Solid phase microextraction/Onsite analysis引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据