Selective flocculation processing technology of chitosan complex flocculant on Shuanghuanglian aqueous extract / 中草药

ABSTRACT

Objective: To optimize the selective flocculation processing technology of chitosan complex flocculant on Shuanghuanglian aqueous extract. Methods: The impacts of preparation technology, the dosage of complex flocculant, the time of flocculation, and the performance index of chitosan on the flocculating effect of Shuanghuanglian aqueous extract were examined by using the retention rates of chlorogenetic acid and baicalin, as well as the elimination rate of tannin as observation indicators. Results: The selective flocculation processing technology on Shuanghuanglian aqueous extract was optimized as follows the bentonite was loaded by chitosan after it was burned for 4 h at 450°C, the dosage of complex flocculant was 60 g/L, the flocculating time was 24 h, and the best performance index of chitosan is 95% in deacetylation, and 60 cps in viscosity. Conclusion: The complex flocculant made of high temperature modified bentonite loaded by chitosan shows the good selectivity in flocculation capacity. The flocculating effect of this method on Shuanghuanglian aqueous extract is remarkably better than that in the one documented in Chinese Pharmacopoeia.