Development of a Plasma-Assisted Cataluminescence System for Benzene, Toluene, Ethylbenzene, and Xylenes Analysis
Authors:
- 15 April 2010
- journal article
- letter
- Published by American Chemical Society (ACS) in Analytical Chemistry
- Vol. 82 (9) , 3457-3459
Abstract
A novel method has been proposed to enhance efficiency of cataluminescence reaction by applying a plasma-assisted cataluminescence (PA-CTL) system. The obtained results clearly indicated that the PA-CTL system exhibited substantially higher sensitivity for the detection of benzene, toluene, ethylbenzene, and xylenes (BTEX) on the surface of nanosized ZrO2. There are two distinctive advantages in the PA-CTL system; on one hand, the plasma activates the BTEX molecules for the detection, and on the other hand, the working temperature range of the catalytic reaction is lowered with the plasma assistance. A detection limit (LOD = 3σ) of 20 ng mL−1 was achieved for benzene in air samples. Using a graphite electrode in the designed plasma provides an additional opportunity for solid-phase microextraction (SPME) sampling of volatile organic compounds (VOCs) on its surface followed by PA-CTL detection. This ability has been investigated for detection of m-xylene in air samples.Keywords
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