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目的研究气相色谱法测定蒸馏酒中的甲醇和杂醇油,并用于样品的检测。方法参照国家标准方法,应用GDX-102填充柱,优化色谱条件。结果改良后的方法分离效果好,甲醇、异丁醇、异戊醇相对标准偏差分别为:2.5%、3.3%、4.2%。将该法用于蒸馏酒中的甲醇和杂醇油的测定,加标回收率分别为90.0%、85.0%、93.3%。结论该法简便、快速、精密度好,适合于分析甲醇和杂醇油。
Objective To study the determination of methanol and fusel oil in distilled spirit by gas chromatography and to detect samples. Methods Reference to national standards, the application of GDX-102 column, the optimization of chromatographic conditions. Results The improved method has a good separation effect. The relative standard deviations of methanol, isobutanol and isoamyl alcohol were 2.5%, 3.3% and 4.2%, respectively. The method was applied to the determination of methanol and fusel oil in distilled liquor with recoveries of 90.0%, 85.0% and 93.3% respectively. Conclusion The method is simple, rapid, accurate and suitable for the analysis of methanol and fusel oil.