Research Article
Gradual Optimization of Headspace Solid-Phase Microextraction Conditions of Volatiles in Pepper Chicken Soup Combined with Gas Chromatography-Mass Spectrometry and Principal Component Analysis
Figure 5
Effects of different sample volume on peak areas of key aroma compounds. English letters “a”, “b”, “c”, “d” indicate Duncan’s multiple range test among peak areas of the five sample volumes. Data in the same compound marked with different letters mean significant difference (p<0.05) and the same letters denote not significant difference (p<0.05).