Essential oils from Limnocitrus littoralis species in Southcentral coast of Vietnam
Description
The essential oils of seeds, peels, and leaves from Limnocitrus littoralis (Miq.) Swingle growing wildly in three provinces belonging to the southcentral coast of Vietnam were extracted by hydrodistillation method. Organoleptic properties, specific gravity, refractive index, and optical rotation were analyzed according to international standards ISO (International Organization for Standardization) or AFNOR (French Association of Normalization) standard, at 25 oC. The chemical compositions of essential oils were analysed by GC and GC/MS methods. Essential oil constituents were identified by comparing their mass spectra with those of standard compounds registered in the NIST 2014 and NIST 2020 libraries. Moreover, the identification was also confirmed by collating the observed LRI (linear retention indices) of each constituent with those reported in the compilation of retention indices published by Adams. The observed LRI was calculated by using the equation propounded by van den Dool and Kratz to the homologous series of C9-C20 n-alkanes (Sigma-Aldrich). The relative percentage of each constituent in the oil was determined by peak area normalization