Gradual Optimization of Headspace Solid-Phase Microextraction Conditions of Volatiles in Pepper Chicken Soup Combined with Gas Chromatography-Mass Spectrometry and Principal Component Analysis

<div>Effects of extraction time on peak areas of key volatile compounds. English letters “a”, “b”, “c” indicate Duncan’s multiple range test among peak areas of the five extraction times. Data in the same compound marked with different letters mean significant difference (<i>p</i>&lt;0.05) and the same letters denote not significant difference (p&lt;0.05).</div>

International Journal of Analytical Chemistry

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Figure 9

Figure 9: 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 9 | Gradual Optimization of Headspace Solid-Phase Microextraction Conditions of Volatiles in Pepper Chicken Soup Combined with Gas Chromatography-Mass Spectrometry and Principal Component Analysis 