[Study on preparation process and analytical methods of ESAC from Ganoderma lucidum].
OBJECTIVE
To develop the procedure for separating the ethanol-soluble and acidic components (ESAC) from Ganoderma lucidum, and to establish a method for quantifying ESAC in G. lucidum.


METHODS
The ethanol extract of G. lucidum was extracted with a saturated NaHCO3 solution, acidified and re-extracted by chloroform to obtain ESAC. The quantitative analysis of ESAC was based on the characteristic color reaction between ESAC and H2SO4.


RESULTS
The optimal conditions for separating ESAC on a 10 g scale are as follows: ratio of material and ethanol (mL), 1:15; immersing time, 24 h; volume of saturated NaHCO3 and chloroform, 1300 mL; extract 3 times. The condition for measuring ESAC is as follows: sample weight, 1 g; solution volume, 1.5 mL; immuersing time, 0.5 h; detecting reagent, 50% H2SO4 in ethanol; heating time in 100 degrees C water bathe, 3 min; measuring wavelength, 490 nm.


CONCLUSIONS
The procedure for ESAC preparation is simple and well-designed, and the established method for ESAC can be used for the qualitative analysis of the G. lucidum related products.
Huang
Shu-ming
SM
School of Life Sciences and Technology, Beijing Institute of Technology, Beijing 100081, China.
Yang
Xin-lin
XL
Wang
Bang-wu
BW
Zhu
He-sun
HS
Xu
Jian-lan
JL
D004365:Drugs, Chinese Herbal / Q000032:analysis / Q000302:isolation & purification*; D000431:Ethanol; D020940:Reishi / Q000737:chemistry*; D013678:Technology, Pharmaceutical / Q000379:methods*; D014315:Triterpenes / Q000032:analysis / Q000302:isolation & purification*
D004365:Drugs, Chinese Herbal; D014315:Triterpenes; D000431:Ethanol