ABSTRACT
OBJECTIVE： To optimize the water extraction technology of total polysaccharide of Shuanghu capsules. METHODS： The total alkaloid was firstly extracted from Dendrobium nobile and Dendrobium officinale mixture of Shuanghu capsules with ethanol， and then total polysaccharide was extracted with water. Using glucose as control， total polysaccharide was treated with phenol-sulfuric acid method and its content was determined at 488 nm. Using comprehensive score calculated with the yield of the extract and the content of total polysaccharide as index， the effects of material-liquid ratio， extraction temperature， extraction time and times on the extraction were investigated by single factor test. Then L9（34） orthogonal test was used to optimize solid-liquid ratio，extraction temperature，extraction time and extraction times according to the results of single factor test. The optimized technology was validated. RESULTS： The linear range of glucose were 0.041 4-0.207 0 mg/mL（r＝0.999 9）. RSDs of intra-day and inter-day ranged 3.61％-8.24％ （n＝3，n＝5）， and RSD of repeatability test was 1.49％ （n＝6）. Average recovery rate was 98.65％（RSD＝1.45％，n＝6）. The optimal water extraction technology included solid-liquid ratio of 1 ∶ 25（g/mL），extraction temperature of 100 ℃，extracting for 90 min， extracting once. Results of validation tests showed that average content of total polysaccharide was 379.292 8 mg/g （RSD＝1.93％，n＝3） and average yield of the extract was 22.75％（RSD＝2.41％，n＝3）. CONCLUSIONS： Established phenol-sulphuric acid method is simple， precise and accurate. The optimal water extraction technology is stable and feasible， which can be used for the extraction of total polysaccharides from Shuanghu capsules.
ABSTRACT
Objective: To optimize extraction process of Yinsangju solid beverage(YSJ). Methods: The extraction of YSJ was preliminarie optimized through the orthogonal design,and then further optimized by Box-Behnken design-response surface with the overall desirability (OD) of chlorogenic acid and polysaccharide content and yield of extract as evaluation indexes. Results: The optimum extraction of orthogonal design was as follow: 10 times the amount of water,soaked 0.5 h,extracted 2 times,each time 1.5 h. The optimum extraction of Box-Behnken design was 10.82 times the amount of water,soaked 0.51 h,extracted 2 times,each time 1.77 h. Conclusion: The test results show that the Box-Behnken response surface method optimization of extraction process parameters is more precise and more detailed and predictability is good, and the product quality is improved.
ABSTRACT
Objective To optimize extraction process of Yinsangju solid beverage(YSJ). Methods The extraction of YSJ was preliminarie optimized through the orthogonal design,and then further optimized by Box-Behnken design-response surface with the overall desirability(OD)of chlorogenic acid and polysaccharide content and yield of extract as evaluation indexes. Results The op?timum extraction of orthogonal design was as follow:10 times the amount of water,soaked 0.5 h,extracted 2 times,each time 1.5 h. The optimum extraction of Box-Behnken design was 10.82 times the amount of water,soaked 0.51 h,extracted 2 times,each time 1.77 h. Conclusion The test results show that the Box-Behnken response surface method optimization of extraction process parameters is more precise and more detailed and predictability is good,and the product quality is improved.