摘要
Because of the complexity of the food matrix and the presence of a variety of aroma compounds,the co-elution phenomenon has always presented a challenge for the analysis of complex extracts.Comprehensive twodimensional gas chromatography(GC×GC)has been widely used in the identification of complex extracts due to its powerful separation capabilities.Additionally,it has a large column capacity,a high signal-to-noise ratio,and high sensitivity.Currently,it’s widely used in the separation and identification of aroma compounds in alcoholic beverages,dairy products,and condiments.This technology can be used for a variety of purposes,such as classifying food,identifying the geographic origin,and judging the freshness of food.An overview of GC×GC is provided in this paper,along with its advantages and applications in a variety of fermented foods(Baijiu,soy sauce,cheese,tea,and beer).GC×GC is one of the most powerful techniques available to detect complex aroma compounds in the food and beverages industries and its increasing use will ensure that the composition of the aroma will be analyzed more comprehensively.
