Rapid Temperature-Programmed Separation of Carbon Monoxide and Carbon Dioxide on a Packed Capillary Column in Gas Chromatography: Application to the Evaluation of Photocatalytic Activity of TiO2

Abstract

Carbon monoxide (CO) and carbon dioxide (CO2) were determined in a conventional capillary gas chromatography-flame ionization detector (GC-FID) by introducing a packed-capillary column and a methanizer. Due to good compatibility with rapid temperature-programmed operation of the packed capillary column, several volatile compounds, including CO and CO2, were rapidly eluted along with satisfactory resolution and sample loading capacity. The limit of quantifications of CO and CO2 were 5 and 3 ppm, respectively, with an injection volume of 0.5 mL. The developed system was then successfully applied to evaluating the photocatalytic decomposition of volatile organic compounds on titanium dioxide (TiO2).

Evaluation of Thermal Catalytic Decomposition of Organic Compounds with TiO2 by Packed-Capillary Gas Chromatography

“…This could be due to the presence of many impurities or active sites in the catalyst. In the photocatalytic degradation of organic compounds on TiO2 particles, CO was not generated, 11 although certain amounts of CO were generated in this study. The ratio of generated CO and CO2 were varied with decomposition temperature or organic compounds.…”

“…10 Recently, we reported the determination of CO and CO2 in a conventional capillary GC-FID system, where a packed-capillary column was introduced along with a commercially available methanizer designed for conventional packed columns of 3 -4 mm i.d. 11 On the basis of good compatibility of the packed-capillary column to the methanizer, this technique was applied for the evaluation of the photocatalytic decomposition of organic compounds on TiO2 particles. The system allows for sensitive and rapid determination of small amounts of CO and CO2 in a conventional capillary GC instrument without the need for any significant system modification.…”

Miniaturization for the Development of High Performance Separation Systems

“…Miniaturization of packed columns in GC [119][120][121][122][123] is also possible for high speed analysis with a unique selectivity but without a loss of sample loading capacity. …”

Needle-type Extraction Device Designed for Rapid and Sensitive Analysis in Gas Chromatography

“…[64][65][66] A wide variety of additional applications of the needle-type extraction devices coupled with the packed-capillary column will be expected, [67][68][69][70] along with further developments of miniaturized separation techniques, while offering many advantageous features.…”