Analysis of volatile compounds of Luzhou-flavor liquor from different pit ages by GC-MS
The flavor substances in Luzhou-flavor Chinese liquor with different pit ages were extracted by simultaneous distillation extraction, and the components were identified by GC-MS.The results showed that a total of 51 volatile compounds were characterized by GC-MS, and there were 30 common volatile compounds in six liquors.With the increasing of pit ages, the relative contents of various compound changed as well.The alcohol content in the Chinese liquor with 15 years pit ages decreased from 12.4% to 4.03%, the aldehyde content declined from 7.25% to 1.28%.However,the ester compounds, especially ethyl caproate, increased from 53.44% to 69.39%.The acids, phenols and heterocyclic compound in the Chinese liquor changed little.