板栗苞中栲胶提取工艺的研究

Study on tannin extract from chestnut (Castanea mollissima Blume) shell

中文关键词:  板栗苞  栲胶  均匀实验  铬皮粉法

英文关键词:chestnut shell  tannin extract  uniform experiment  hide powder method

中文摘要:

      目的 以板栗苞为原料, 研究板栗苞提取栲胶的最佳工艺。方法 在粉碎粒度、丙酮溶液浓度、料液比和超声功率单因素实验基础上, 以栲胶提取率为响应值, 设计4因素3水平的均匀实验, 通过均匀设计偏最小二乘回归建模分析, 得出最优指标时各个因素组合参数, 并采用铬皮粉法对最优条件下提取的栲胶进行分析。结果 板栗苞中栲胶提取的最佳工艺为: 粉碎粒度100目, 50%丙酮溶液, 料液比1:18, 超声功率400 W, 在此条件下, 栲胶提取率为31.28%, 单宁含量为63.68%, pH值为3.81, 总色值为22。结论 以板栗苞为原料提取的栲胶达到了橡椀栲胶冷溶合格品的指标, 说明板栗苞提取栲胶的工艺可行性。

英文摘要:

      Objective To obtain the optimum extraction parameters of tannin extract from chestnut shell. Methods Based on single-factor test, uniform experimental design with 4-factor and 3-level was adopted to study the effects of particle size, concentration of acetone solution, solid-liquid ratio and ultrasonic power on the extraction rate of tannin extract. Using partial least squares regression analysis, the optimal extraction pa-rameters were obtained. Component of tannin extract was also analyzed by hide powder method. Results The optimum conditions of tannin extract from chestnut shell were as follows: particle size was 100 meshes, 50% acetone solution, solid-liquid ratio was 1:18 and ultrasonic power was 400 W. Under this condition, the extraction rate of tannin extract was 31.28%, the content of tannin was 63.68%, the pH value was 3.81 and the total color value was 22. Conclusion The tannin extract from chestnut shell has reached the standard of cold-soluble valonea extraction, which illustrated the feasibility of using chestnut shell as a kind of material for tannin extract.