Composition in essential oilThe molecular formula and content of representativechemical compositions in essential oil of menthol mintand orange peel are listed in Tables 1 and 2, respectively.It can be seen from Tables 1 and 2 that the compositions of essential oil obtained by different extractionmethods are much the same, indicating that improvedSFME is comparable to the other extraction methodsand suitable for the extraction of essential oil. However,the contents of every compound extracted by differentmethods are different. For example, the content of
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