title: A rapid method for simultaneously determining ethanol and methanol content in wines by full evaporation headspace gas chromatography.
abstract: 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 (10μL) 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°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.
authors: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China.
authors: Chun-Yun
authors: CY
authors: Zhang
authors: Inspection & Quarantine Technical Center of Zhuhai Entry-Exit Inspection & Quarantine Bureau of P.R.C, Zhuhai, China.
authors: Neng-Biao
authors: NB
authors: Lin
authors: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China. Electronic address: xschai@scut.edu.cn.
authors: Xin-Sheng
authors: XS
authors: Chai
authors: Inspection & Quarantine Technical Center of Zhuhai Entry-Exit Inspection & Quarantine Bureau of P.R.C, Zhuhai, China.
authors: Zhong-Li
authors: School of Environment and Energy, South China University of Technology, Guangzhou, China.
authors: Donald G
authors: DG
authors: Barnes
mesh_terms: D000438:Alcohols / Q000032:analysis; D002849:Chromatography, Gas / Q000379:methods*; D000431:Ethanol / Q000032:analysis*; D000432:Methanol / Q000032:analysis*; D014920:Wine / Q000032:analysis*
chemical_list: D000438:Alcohols; D000431:Ethanol; D000432:Methanol
keywords: Ethanol; Full evaporation; Headspace GC; Methanol; Wines