Optimization of Supercritical CO2 Extraction Process of Volatile Oil from Dalbergia benthamii by Response Surface Methodology and Its Component Analysis
Dalbergia benthamii is a precious spice.Improving the extraction rate of its volatile oil is of great significance for industrial production.With Dalbergia benthamii as the raw material,supercritical CO2 extraction method is used to extract volatile oil from Dalbergia benthamii.Based on single factor test,response surface methodology is used to optimize the extraction process,and the optimal process conditions are determined.The volatile components of Dalbergia benthamii volatile oil are analyzed by gas chromatography-ion migration spectrometry.The results show that the optimal extraction process of volatile oil from Dalbergia benthamii is as follows:extraction pressure is 30 MPa,extraction temperature is 42 ℃ and extraction time is 3.8 h.The yield of volatile oil under these conditions is(7.23±0.03)％,which is close to the theoretical value of(7.44±0.05)％.A total of 47 known compounds are identified from volatile oil of Dalbergia benthamii,including 17 aldehydes,3 ketones,5 alcohols,11 esters,7 terpenes,2 acids,1 furan and 1 thioether.Aldehydes,esters and terpenes are the main volatile compounds in Dalbergia benthamii volatile oil.This study is of great significance for the further development and utilization of volatile oil from Dalbergia benthamii.
Dalbergia benthamiivolatile oilsupercritical CO2 extractionresponse surface methodology
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