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글로우방전 원자흡수시스템의 구성 및 최적화에 관한 연구
김효진,장혜진,이개호,조정환,Kim, Hyo Jin,Jang, Hye Jin,Lee, Gae Ho,Jo, Jeong Hwan 대한화학회 1994 대한화학회지 Vol.38 No.3
A glow discharge atomic absorption system for the direct analysis of conducting solid samples has been designed and constructed. An arrestor made of machinable ceramic which is a main component for confining the discharge between cathode and anode is modified to have a better stability in discharge. Discharge voltage or current, shape of arrestor, pressure, and gas flow rate can be controlled by an ADC/DAC board with a personal computer. The effect of discharge parameters such as discharge voltage, pressure, and gas flow rate on the sample loss rate, absorbance, and the surface morphology of sample by SEM has been studied to find optimum discharge conditions.
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LN2-less Low-Temperature Chromatography for Permanent Gas Analysis
인민교,문동민,김진석,이개호,임정식 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.2
Cryogenic chromatography has been applied for the quantitative analysis of highly elusive gases or materials, which are difficult to separate on various analytical columns. In many cases, their separability can be increased by cooling the analytical columns with liquid nitrogen or liquid carbon dioxide. However, coolant consumption and maintenance are significant issues in industrial settings as well as in laboratory experiments, in terms of economy and time. To improve the merit of chromatography as an on-line analysis tool, we report herein a gas chromatography method that does not use consumable coolants such as liquid nitrogen or liquid carbon dioxide, and explored its application for providing pure permanent gases in an industrial setting.
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