γ-内酯是食品中的一类重要风味化合物,存在于水果、葡萄酒及白酒等多种食品中。该研究通过液液萃取及固相萃取(SPE)方法,结合气相色谱-质谱(GC-MS),分别定性、定量了白酒中的8种γ-内酯。该定量方法快速,选择性强,对白酒中各内酯均有较好的线性(R2≥0.9908,γ-十二内酯),检出限范围为0.22(γ-癸内酯)～4.30μg/L(γ-壬内酯),低于各内酯的阈值,对不同香型成品酒及原酒的重现性均较好(RSD<15%),可用于白酒中微量成分γ-内酯的快速分析测定。

γ-Lactones is a kind of important aroma compound existing in several food products(such as fruit,wine and baijiu).On the base of the important role in the aroma and flavor of food,8 γ-lactones in Chinese liquors(baijiu) were identified and quantified using the method of liquid-liquid extraction(LLE) and solid phase extraction(SPE) coupled with gas chromatography mass spectrometry(GC-MS),respectively.This method was shown to be rapid,selective and with high correlation coefficient(R~2≥0.9908,γ-dodecalactone).The detection limits of the method range from 0.22μg/L(γ-decalactone) to 4.30μg/L(γ-nonalatone),and well below the olfactory thresholds of compounds.The relative standard deviation(RSD) is less than 15%.This method can applied to γ-lactones quantification in Chinese liquors.