碱法提取普洱茶渣膳食纤维的工艺优化  

Optimization of Alkaline Extraction of Dietary Fiber from Pu-erh Tea Residue

作　　者：孟圆 夏婷[1] 程艳 耿贝贝 权冰艳 宋睿喆 于金浩 王敏[1] 白晓丽 MENG Yuan;XIA Ting;CHENG Yan;GENG Beibei;QUAN Bingyan;SONG Ruizhe;YU Jinhao;WANG Min;BAI Xiaoli(State Key Laboratory of Food Nutrition and Safety,College of Biotechnology,Tianjin University of Science&Technology,Tianjin 300457,China;State Key Laboratory of Innovative Chinese Medicine,Tasly Pharmaceutical Group Co.,Ltd.,Tianjin 300410,China)

机构地区：[1]天津科技大学生物工程学院省部共建食品营养与安全国家重点实验室,天津300457 [2]天士力医药集团股份有限公司创新中药关键技术国家重点实验室,天津300410

出　　处：《食品研究与开发》2023年第18期158-164,共7页Food Research and Development

基　　金：天津市研究生科研创新项目(2022SKYZ113)。

摘　　要：以普洱茶渣为原料,通过碱法提取茶渣中膳食纤维,研究影响因素(碱液浓度、碱解温度、碱解时间和料液比)对普洱茶渣中膳食纤维得率的影响。结合单因素和响应面试验得到最优提取工艺参数为碱液浓度3.35%、碱解温度100℃、碱解时间2.36 h、料液比1∶28(g/mL)。在该条件下,普洱茶渣中膳食纤维的得率为82.26%,较提取前极显著提高(P<0.001)。提取后的茶渣膳食纤维中纤维素、半纤维素、木质素和果胶的含量分别为52.10%、14.20%、15.30%和5.00%,以不溶性纤维为主。Dietary fiber was extracted from Pu-erh tea residue by alkaline method.The factors(alkali concentration,alkaline extraction temperature,extraction time,and solid-to-liquid ratio)influencing the dietary fiber yield were studied.The extraction conditions were optimized by single factor test and response surface methodology as extraction with 3.35%alkali and the solid-to-liquid ratio of 1∶28(g/mL)at 100℃for 2.36 h.Under these conditions,the yield of dietary fiber from Pu-erh tea residue was 82.26%,which was significantly higher than that before extraction(P<0.001).The content of cellulose,hemicellulose,lignin,and pectin in dietary fiber from the tea residue was 52.10%,14.20%,15.30%and 5.00%,respectively,and insoluble fiber was the main fiber component.

关 键 词：茶渣 普洱茶 膳食纤维 碱法 响应面 提取工艺 

分 类 号：TS209[轻工技术与工程—食品科学]