AUTHOR=Li Guoqiang , Liu Shuxun , Zhou Qingqing , Han Jiarun , Qian Cheng , Li Yongquan , Meng Xia , Gao Xin , Zhou Tao , Li Ping , Gu Qing 

TITLE=Effect of Response Surface Methodology-Optimized Ultrasound-Assisted Pretreatment Extraction on the Composition of Essential Oil Released From Tribute citrus Peels

JOURNAL=Frontiers in Nutrition

VOLUME=Volume 9 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2022.840780

DOI=10.3389/fnut.2022.840780

ISSN=2296-861X

ABSTRACT=The traditional hydrodistillation(HD) and ultrasound-assisted methods(UAE) were proposed to obtain essential oil (EO) from Tribute citrus(TC) peels. The Box-Behnken design was employed for the optimization of the traditional hydrodistillation and ultrasound-assisted extraction procedure. Moreover, GC-MS and Electronic nose (E-nose) were applied to identify the discrepancy of extraction methods. The yield of essential oil extracted by UAE(114.02 mg/g) was relatively higher than HD(85.67 mg/g) The optimum UAE conditions led to a significantly higher essential oil yield than that of HD. A total of 28 compounds were extracted from the TC peels as terpenes were the predominant components. D-limonene was the most vital compound in the Tribute citrus essential oil(TCEO) accounting for 86.38% of total volatile concentration in HD and 86.75% in UAE, respectively. The chart of radar and graphic of principal components analysis by E-nose displayed no significance, which was similar to GC-MS results. The present study demonstrated that UAE is an efficient method for Tribute citrus essential oil extraction, which provides a promising method for the separation of essential oil from aromatic plant materials.