저온농축 열탈착방식에 의한 저농도 불소계 온실가스의 정량분석
Quantitation of Low Concentration Fluorinated Greenhouse Gases by Cryogenic Trapping-thermal Desorption Method
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초록
Fluorinated greenhouse gases have a significant impact on the environment. We propose a new analytical method for the quantitation of fluorinated gases in low concentration, such as perfluorocarbons, NF3, and SF6, in air samples. This method uses a cryogenic trapping–thermal desorption system, utilizing a gas chromatography/ mass spectrometry (GC/MS) system in combination with a cryogenic trapping system operated at temperatures from −30 to 300°C. The linearity, precision, method detection limits (MDLs), and limits of quantification (LOQs) of this system were verified using the chromatogram peak areas of the fluorinated greenhouse gases in the samples. The MDLs and LOQs for the gases tested were less than 1 nmol/mol and 3.1 nmol/mol, respectively. In addition, the precision of the analysis was less than 2%. Our results indicate that the proposed method is able to quantitatively analyze low concentrations of fluorinated greenhouse gases.
Abstract
Fluorinated greenhouse gases have a significant impact on the environment. We propose a new analytical method for the quantitation of fluorinated gases in low concentration, such as perfluorocarbons, NF3, and SF6, in air samples. This method uses a cryogenic trapping–thermal desorption system, utilizing a gas chromatography/ mass spectrometry (GC/MS) system in combination with a cryogenic trapping system operated at temperatures from −30 to 300°C. The linearity, precision, method detection limits (MDLs), and limits of quantification (LOQs) of this system were verified using the chromatogram peak areas of the fluorinated greenhouse gases in the samples. The MDLs and LOQs for the gases tested were less than 1 nmol/mol and 3.1 nmol/mol, respectively. In addition, the precision of the analysis was less than 2%. Our results indicate that the proposed method is able to quantitatively analyze low concentrations of fluorinated greenhouse gases.
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