Optimization for Extraction Technology of Qinhuang Gel by Multicreteria Comprehensive Assessment

OBJECTIVE To optimize the extraction technology of Qinhuang gel. METHODS With the transferring rate of baicalin, aloe emodin, rhein, emodin, chrysophanol, physcion as index, orthogonal design L9(3⁴) was carried out for the optimum extraction technology of Qinhuang gel by water and ethanol. RESULTS The optimum extraction technology by water were as follows:6-fold water, soaking 0.5 h, reflux extracting 2 times and 1.5 h each time; the optimum extraction technology by ethanol were as follows:8-fold 40% ethanol, reflux extracting 3 times and 1.0 h each time. CONCLUSION The extraction technology of Qinhuang gel optimized by multicreteria comprehensive assessment is reasonable and practical.