Analysis of Volatile Compounds in Enteromorpha prolifera Harvested during Different Seasons by Electronic Nose and HS-SPME-GC-MS
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Abstract:
In this study, the composition and spectrum of volatile compounds in Enteromorpha prolifera harvested from winter and spring, were analyzed using electronic nose (E-nose) and head space solid-phase micro extraction combined with gas chromatography mass spectrometry (HS-SPME-GC-MS). The data from E-nose sensors and t-test results showed significant differences in the composition and types of volatile compounds in E. prolifera between samples collected during the two seasons. HS-SPME-GC-MS analysis identified 68 and 82 different volatile compounds in E. prolifera harvested in spring and in winter, respectively. In addition, the main volatile compounds in the former were hydrocarbons and aldehydes, whereas those in the latter were aldehydes and ketones. The relative content of volatile compounds between samples contained in the two seasons differed mainly with respect to alcohols, ketones, acids, hydrocarbons, and heterocyclic compounds. At the same time, among the heterocyclic compounds, a bitter compound, methylpyrazine, was detected in E. prolifera harvested in winter, with a relative content of 0.13%, but it was not detected in samples harvested in spring. Therefore, significant differences were observed in the composition and the types of volatile compounds in E. prolifera harvested in different seasons.
