空气中苯系物在不同萃取头上的竞争吸附研究

杨宇川; 林涛; 辉永庆; 刘秀华

空气中苯系物在不同萃取头上的竞争吸附研究

基金项目: 国防科技工业技术基础科研项目(编号:H112006A02)

详细信息

作者简介:
杨宇川(1979-),男,硕士,助理研究员;研究方向:环境科学,环境功能材料,E-mail:Loungo@tom.com

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出版历程
- 收稿日期: 2009-06-20
- 刊出日期: 2017-06-25

Study on Competitive Adsorption of BTEXs on the SPME Coat in Air

摘要

摘要:
[目的] 探索并提高对空气中苯系物的快速定量检测能力。

[方法] 采用多组分苯系物标准气体对萃取头的吸附情况和各种参数进行分析,对固相微萃取技术应用于空气中苯系物的检测方法和竞争吸附行为进行研究。

[结果] 萃取效率最高的萃取头为碳分子筛/ 聚二甲基硅氧烷(CAR/PDMS);沸点越高的苯系物在萃取头上的竞争力越强;在2~42.5 mg/m³ 浓度范围,标准气体的吸附量随浓度呈一定的线性关系。

[结论] 固相微萃取技术在空气中苯系物定量检测的应用过程中受多种因素影响,各种苯系物在萃取头表面存在显著的竞争吸附效应,使定量较为困难。
- 苯系物 /
- 固相微萃取 /
- 竞争吸附
Abstract:
[Objective] To improve the capabilities of rapid quantitative detection for benzene homologues in air.

[Methods] Adsorption analysis and evaluation of various parameters of solid-phase micro-extraction(SPME)technology on the extraction of multi-component standard benzene homologue gas (BETXs) standard gas were investigated. The detection methods and mutual competitive adsorption behaviour of benzene homologues on SPME coat were studied.

[Results] The most efficient SPME coat is CAR/PDMS. Benzene homlogue with higher boiling point posses higher competitiveness in the extraction of the coat. Adsorption of standard gas in range of 2-42.5 mg/m³ increases with the concentration linearly.

[Conclusion] Application of SPME technology for determining benzene homologues in air was influenced by many factors. Competitive adsorption among components in BETXs on the surface of extraction head makes more or less difficult for quantitative determination.
- standard benzene homologue gas(BETXs) /
- solid-phase micro-extraction (SPME) /
- competitive adsorption