https://scholars.lib.ntu.edu.tw/handle/123456789/577065
標題: | A mems _-preconcentrator employing a carbon molecular sieve membrane for highly volatile organic compound sampling | 作者: | Kuo H.-Y Cheng W.-R Wu T.-H Sheen H.-J Wang C.-C Lu C.-J. HORN-JIUNN SHEEN |
公開日期: | 2021 | 卷: | 9 | 期: | 5 | 來源出版物: | Chemosensors | 摘要: | This paper presents the synthesis and evaluation of a carbon molecular sieve membrane (CMSM) grown inside a MEMS-fabricated μ-preconcentrator for sampling highly volatile organic compounds. An array of ?-pillars measuring 100 ?m in diameter and 250 ?m in height were fabricated inside a microfluidic channel to increase the attaching surface for the CMSM. The surface area of the CMSM was measured as high as 899 m2/g. A GC peak amplification factor >2 × 104 was demonstrated with gaseous ethyl acetate. Up to 1.4 L of gaseous ethanol at the 100 ppb level could be concentrated without exceeding the capacity of this microchip device. Sharp desorption chromatographic peaks (<3.5 s) were obtained while using this device directly as a GC injector. Less volatile compounds such as gaseous toluene, m-xylene, and mesitylene appeared to be adsorbed strongly on CMSM, showing a memory effect. Sampling parameters such as sample volatilities, sampling capacities, and compound residual issues were empirically determined and discussed. ? 2021 by the authors. Licensee MDPI, Basel, Switzerland. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85106632440&doi=10.3390%2fchemosensors9050104&partnerID=40&md5=b87670c89878e8db8339d13c90589938 https://scholars.lib.ntu.edu.tw/handle/123456789/577065 |
ISSN: | 22279040 | DOI: | 10.3390/chemosensors9050104 |
顯示於: | 應用力學研究所 |
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