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Rapid determination of ethanol in fermentation liquor by full evaporation headspace gas chromatography |
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| Authors: | Hailong Li Xin-Sheng Chai Yulin Deng Huaiyu Zhan Shiyu Fu |
| Institution: | 1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China;2. Institute of Paper Science and Technology, Georgia Institute of Technology, Atlanta, GA 30332, USA;3. School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA |
| Abstract: | This paper reports a full evaporation (FE) headspace gas chromatographic (GC) method for rapid determination of ethanol in fermentation liquor. The data show that ethanol in the fermentation liquor was transferred to the vapor phase (headspace) almost completely within 3 min at a temperature of 105 °C when a very small volume (<50 μL) of sample was directly added to a sealed headspace sample vial (20 mL). The ethanol in the vapor phase was then measured by headspace GC using a flame ionization detector. The results show that the present method has an excellent measurement precision (RSD = 1.62%) and accuracy (recovery = 98.1 (±1.76%)) for the ethanol quantification in fermentation liquors. The method requires no sample pretreatment and is very simple and rapid. |
| Keywords: | Headspace Gas chromatography Full evaporation Ethanol Fermentation |
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