科研之友
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摘要
Fusel oils (FOs) are higher alcohols (including propanol, isobutanol, isoamylol, and active amyl alcohol), which affect the aroma profiles and flavor profiles of wine. A novel method for determination of FOs in lychee wine was developed using headspace gas chromatography (HS-GC). Results showed that 12% standard curve (SC) can be used to determinate the FOs of low alcoholic beverages, yet 40% SC can be used for high alcoholic beverages (e.g., brandy). Optimization of the parameters of equilibrium temperature at 50 A degrees C was maintained for 30 min. The stabilized gas-liquid phase ratio of 3:1 for further research had no significant differences with others, which is caused by the distribution coefficient of K ae << 100. The addition of sodium chloride (NaCl) decreased the partition coefficient of FOs markedly, and an inverse situation was observed for the extraction of FOs saturating at 1.25 g NaCl in 5 mL LW. Relative standard deviations (RSD) of reproducibility tests were in the range of 1.03-4.91%. Meanwhile, the mean recoveries of low, middle, and high concentration levels were 100.94, 103.2, and 96.74%, respectively. HS-GC was a stabilized, concise, and efficient method compared with the International Organization of Vine and Wine (OIV) method of OIV-MA-BS-14. These findings provide a foundation to determine higher alcohols of alcoholic beverages.
- 出版日期2017-10
- 单位华南理工大学
