Chemical Constituents of Essential Oils of Cymbopogon distans from Two Producing Areas during Different Storage Periods
Ting Ren, Ze-Ping Qin, Da-Hai Mei and Qiu-Yan Song*
Published: July 10, 2022
DOI: 10.55162/MCNH.01.007
Abstract
The essential oils of Cymbopogon distans from Gansu and Sichuan were obtained by dynamic headspace method and analyzed by gas chromatography and mass spectrometry for different storage periods (1 month, 3 months, 6 months, and 12 months). The types of chemical constituents of essential oil from Gansu C. distans with different storage periods are alkanes, esters, amides, and ketones. In addition to the above four, compounds of Sichuan C. distans essential oil also include aldehydes, benzenes, and carboxylic acids. Alkanes of the essential oil collected from the two regions increased with storage time. After 12 months of
storage, amides was the largest in the essential oil of Gansu, while that of Sichuan was ketones. The essential oils of Gansu and Sichuan C. distans were identified 24 and 27 compounds, respectively. Among these compounds, hexadecane and heneicosane are the major compounds inessential oil of Gansu and Sichuan C. distans, respectively. Dibutyl phthalate, hexacosane, and heneicosane were produced in the two places in the same period, which can be used to identify the chemical fingerprint of C. distans. Six differential metabolites (nonadecane, heptadecane, octadecane, dibutyl phthalate, 2-methyl-hexacosane, and heneicosane) can be used as a basis for judging the origin of C. distans.