Abstract: N lng ［Blumea.balsamifera (L.) DC.］ oil is one of the essential oil that has a wide variety of application in Chinese traditional medicine manufacturing industry,and also has a potential to be used as an insect repellent and antiseptic product in future.N lng oil is obtained using a steam distillation where an aromatic chemical is extracted from B.balsamifera (L.) DC.leaves by steam and condensed which provide relatively high yield of product and low cost of running the process.The aim of this study was to improve the yield of N lng oil extraction by using ultrasonicassisted,saltingoutassisted and optimizing the extraction condition.With the orthogonal test design,the ultrasonicassisted time,the ratio of of material to solvent,the concentration of sodium chloride and the time of extraction were compared to observe the effect on the extraction of volatile oil from N lng plants.The best N lng oil extraction rate by ultrasonicassisted saltingout hydrodistillation method was 0.42%,and the optimization combinations of best yield were when the ultrasonicassisted time was 30 min,the ratio of material to water was 1:06,the concentration of sodium chloride was 9.0% and extraction time was 4.0 h.The chemical compositions of N lng oil were also analyzed by GCMS,and 48 components (96.00%) were indentified.The dominant components in the N lng oil were borneol (43.55%),camphor (9.54%),1Octen3ol (8.31%),caryophyllene (6.51%) and βPinene (5.20%).

Key words: N lng oil, Blumea balsamifera (L.) DC., ultrasonicassisted saltingout hydrodistillation, extraction process, orthogonal test, chemical compositions