ABSTRACT: In this paper, the effects of different microwave drying processes on the quality and volatile substances of wild shepherd’s purse were studied.
The volatile substances of wild shepherd’s purse were analyzed by headspace solid phase microextraction (HSSPME) combined with gas chromatography-mass spectrometry (GC-MS) using 120 W, 240 W, 360 W, 480 W, 600 W and 700 W microwave power.
The results showed that microwave drying equipment resulted in a significant decrease in the contents of characteristic alcohols such as folic alcohol, trans-2-hexene-1-alcohol, 2,6-dimethylcyclohexanol and so on. The types and contents of aldehydes decreased slightly, but the contents of isovaleraldehyde, (E) -2-pentenal, n-octanaldehyde and phenylacetaldehyde increased, and the contents of isovalerate nitrite and ethyl 2-methyl-valerate increased. Acidifiers such as 3-methyl butyric acid, 2-methyl butyric acid, hexanoic acid and octanoic acid disappeared, while hydrocarbons such as styrene and cyclotetradecane disappeared.
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