A rapid method for simultaneously determining ethanol and methanol content in wines by full evaporation headspace gas chromatography

卷:183

Zhang, Chun-Yun ; Lin, Neng-Biao ; Chai, Xin-Sheng ; Zhong-Li ; Barnes, Donald G.

关键词: Ethanol;    Methanol;    Wines;    Full evaporation;    Headspace GC;   

DOI  :  10.1016/j.foodchem.2015.03.048

学科分类：食品科学和技术

【 摘 要 】

This work reports on a full evaporation headspace gas chromatographic (FE HS-GC) method for simultaneously determining the ethanol (EtOH) and methanol (MeOH) content in wines. A small sample (10 mu L) was placed in a headspace sample vial, and a near-complete mass transfer of ethanol and methanol from the liquid sample to the vapor phase was obtained within three minutes at a temperature of 105 degrees C, which allowed the measurement of the EtOH and MeOH content in the sample by GC. The results showed excellent precision and accuracy, as shown by the reproducibilities of 1.02% and 2.11% for EtOH and MeOH, respectively, and recoveries that ranged from 96.1% to 104% for both alcohols. The method is efficient, accurate and suitable for the determination of EtOH and MeOH in wine production and quality control. (C) 2015 Elsevier Ltd. All rights reserved.