首页|A semi-packed gas chromatography column with high-density elliptic cylindrical posts
A semi-packed gas chromatography column with high-density elliptic cylindrical posts
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NSTL
Elsevier
Semi-packed columns are microfabricated gas chromatography columns which have a large surface area and high aspect ratio. In this paper, a new semi-packed column with high-density elliptic cylindrical posts (SC -HECP) made by a micro-electro-mechanical system (MEMS) technique was reported. Compared to a semi-packed column with cylindrical posts (SC -CP) under the same effective width, the surface area and aspect ratio of SC -HECP were improved by 71.19% and 76.47%, respectively. To compare the performance of these two semi-packed columns, SC -HECP and SC -CP were fabricated. A 10-nm thick alumina film was deposited as the stationary phase by atomic layer deposition technique to ensure the uniformity and repeatability of the stationary-phase film. A contrast experiment was conducted, and the results showed that compared with SC -CP, better separation performance was realized in SC -HECP due to the increase in surface area and aspect ratio. The number of theoretical plates of nonane was increased by 541.84%, and the tailing factor was decreased by 54.31%. (c) 2021 Elsevier B.V. All rights reserved.
Gas chromatography columnMEMSHigh-density elliptic cylindrical postsFABRICATIONSEPARATION
NSTL
Elsevier
