Changes in Ginsenoside Compositions by High Temperature Processing under Various Soaking Conditions

Abstract

Changes in ginsenoside composition of ginseng at high temperatures (110, 130, and 150℃) under various soaking conditions (0 _ 100% ethanol solutions) were determined. The total ginsenoside contents (20.57 _ 27.99 mg/g) of heat-processed ginsengs (HG) at 110 and 130℃ were higher than raw ginseng (16.96 mg/g). Group A's ginsenosides (Rg 1 , Re, Rf, Rb 1 , Rc, Rg 2 (S), Rb 2 , Rb 3 , and Rd) decreased with increasing temperatures and decreasing ethanol concentrations, whereas those of group B (Rh 1 , Rg 2 (R), Rg 6 , F 2 , F 4 , Rk 3 , Rh 4 , Rg 3 (S), Rg 3 (R), Rk 1 , Rg 5 , and Rh 2 )showed the opposite trend. Significant correlations were observed among groups A and B, ethanol concentration, and the processing temperature. This study suggests that the composition and content of ginsenosides are dependent on the processing temperatures and ethanol concentrations, and ginsenoside composition can be altered and its content can be manipulated by adjusting the processing temperatures and ethanol concentrations of soaking solutions.

American Ginseng Slice Drying and Optimization: Effect of Different Drying Methods on Drying Kinetics and Physicochemical Properties

“…This was attributable to the physicochemical properties of ginsenosides and the characteristics of the drying methods. Firstly, researchers found that ginsenosides are thermally unstable [7,30], and the total ginsenoside content of ginseng roots decreased from 7.0 to 4.5% when the drying temperature was increased from 45 to 60 °C. This finding was in good agreement with those reported by Xiao et al [6] and Hwang et al [31].…”