Optimization of Extraction Process for Black Pepper Oleoresin Using Response Surface Methodology

Pepper oleoresin was extracted from black pepper by reflux condensation method.The effects of solvent type,extraction time,refluxing temperature and material-liquid ratio on extraction rate of pepper oleoresin were studied.The results of response surface analysis showed that the optimal extraction conditions were as followed: ethanol as extraction solvent,extraction time of 5.22 h,refluxing temperature of 79.4 ℃,and material-liquid ratio of 1:17.2(g/mL).Under the optimal extraction conditions,the extraction rate of pepper oleoresin was up to 11.0%.