自动进样顶空气相色谱法测定浓缩果汁中的乙醇

Determination of Ethanol in Concentrated Fruit Juice by Headspace and Auto Injection Gas Chromatography

建立了测定浓缩果汁中乙醇含量的自动进样顶空气相色谱分析方法。对实验条件进行了优化。实验结果表明该方法线性范围宽 ,标准曲线相关系数为 0 .9990 8,平均回收率为 98.0 1～ 10 1.86 % ,相对标准偏差均小于 2 .5 % ,方法的重现性好 ;另外 ,该方法简便、快速、准确 ,应用于浓缩果汁的测定结果满意。

A headspace and auto injection gas chromatographic method for determination of ethanol in concentrated fruit juice was established. Meanwhile, the experimental conditions were optimized. The results showed that the method had broad linear scope, good correlation coefficient(R=0.99908), good recoveries(98.01～101.86%), low RSD(<2.5%) and good reproducibility. In addition, the new method was simple, fast, exact and was used in the determination of ethanol in concentrated fruit juice with satisfactory results.