Analytical Sciences

Multi-layer Cartridges Filled with Multi-Walled Carbon Nanotubes for the Determination of Volatile Organic Compounds in Indoor Air

Jiemin LIU,* Lin LI,*^,** Zhanwu NING,*** Peng ZHAO,* and Huili FAN*

*The School of Applied Science, University of Science and Technology Beijing, Beijing 100083, China
**Department of Chemistry, Nankai University, Tianjin 300071, China
***Beijing Municipal Institute of Labor Protection, Beijing 100054, China

A kind of new multi-layer adsorbent including Tenax TA/multi-walled carbon nanotubes (MWCNTs)/Carboxen 564 was developed for collecting volatile organic compounds. The adsorption and desorption efficiencies of 11 kinds of adsorbents (including Activated charcoal, Tenax TA, Carboxen 564, Chromosorb 101, Chromosorb 102, Chromosorb 103, Chromosorb 105, Porapak Q, GDX 301, XAD-2, and MWCNTs) were compared. By combining the advantages of Tenax TA, MWCNTs, and Carboxen 564, new type of multi-layer adsorbents was developed. The adsorption and desorption efficiency, the sampling reproducibility, and the effect of water were improved using multi-layer adsorbents, Tenax TA/MWCNTs/Carboxen 564. New multi-layer adsorbents were successfully applied to the determination of volatile organic compounds (VOCs) in ambient air.

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