Analysis of Volatile Oil and Fatty Acids from Rubia cordifolia Cultured in Shaanxi

In order to preferbly develop and utilize the resource of R.cordifolia,and determine the chemical constituents and relative content of volatile oil and fatty acids from R.cordifolia cultured in Shaanxi,the essential oil and fatty acids in the R.cordifolia cultured in Shaanxi was extracted by steam distillation and ultrasonic extraction.The chemical constituents of the volatile oil and fatty acids from the herb were identified by GC-MS.The results showed that 31 compounds were identified,24 of which were first identified from the Rubia cordifolia.The major components were n-Hexadecanoic acid(36.60%),(Z,Z)-9,12-Octadecadienoic acid(13.91%),cis-13-Octadecenoic acid(5.96%),1-Hydroxy-2-methylanthraquinone(4.06%),Eungeol(3.66%),cis-9-Hexadecenoic acid(3.52%),Dibutyl phthalate(3.26%),Cdro(l3.16%)and(Z,Z,Z)-9,12,15-Octadecatrien oicacid(3.14%).Eight fatty acids were identified,which accounted for over 61.13% of the extracted liquid of Potenilla discolor.The major components were n-Hexadecanoic acid(21.03%),(Z,Z)-9,12-Octa decadienoic acid(17.48%),cis-13-Octadecenoic acid(12.35%),(Z,Z,Z)-9,12,15-Octadecatrienoic acid(3.43%),and oleic acid(3.35%).Unsaturated fatty acids accounted for more than 36.61% of total fatty acids.