| Zn~(2+)沉淀法提取茶多酚工艺研究 |
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| 引用本文： | 杨晓萍,钟梅,周帅祥,毛丹青.Zn~(2+)沉淀法提取茶多酚工艺研究[J].食品与发酵工业,2006,32(4):122-125. |
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| 作者姓名： | 杨晓萍 钟梅 周帅祥 毛丹青 |
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| 作者单位： | 1. 华中农业大学园艺林学学院,武汉,430070
2. 华中农业大学茶学专业,武汉,430070 |
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| 摘 要： | 对Zn2+沉淀法提取茶多酚的工艺条件进行了研究。结果表明,影响Zn2+沉淀茶多酚的因素主要依次为,pH值、ZnSO4用量、沉淀时间;影响茶多酚Zn2+络合物转溶效果的因素依次为,转溶时间、料酸比、HCl浓度。茶多酚沉淀的最佳工艺条件为:溶液pH值7.0,按m(茶多酚)∶m(ZnSO4)=1∶3的比例加入ZnSO4,沉淀20min;茶多酚Zn2+络合物最佳转溶条件为:按1g∶4mL料酸比加入4mol/LHCl,转溶15min,在此工艺条件下,茶多酚得率为23.04%,纯度达90%。
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| 关 键 词： | 茶多酚 Zn2+ 沉淀法 |
| 收稿时间： | 11 29 2005 12:00AM |
| 修稿时间： | 03 12 2006 12:00AM |
Study on Extraction Technological of Tea-polyphenols by Using Zn2 + as Sedimentation Agent |
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| Yang Xiaoping,Zhong Mei,Zhou Shuaixiang,Mao Danqing.Study on Extraction Technological of Tea-polyphenols by Using Zn2 + as Sedimentation Agent[J].Food and Fermentation Industries,2006,32(4):122-125. |
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| Authors: | Yang Xiaoping Zhong Mei Zhou Shuaixiang Mao Danqing |
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| Affiliation: | 1. College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan 430070, China; 2.Department of Tea Science, College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan 430070, China |
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| Abstract: | The results showed that pH had the most significant effect on TP sediment,next was the content of ZnSO_4 and timing.Timing, the ratio between TP-Zn 2+ and acid,and the concentration of HCl all had effect on the aspect of dissolving TP-Zn 2+. The optimum extraction was: pH 7.0,TP∶ZnSO_4=1∶3 in 20 min, the conditions for the best dissolving were: 4 mol/L HCl at 1∶4 ratio with TP-Zn 2+ for 15 min. The yield and the purity of TP could reach to 23.04 % and 90% respectivity. |
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| Keywords: | Zn2 |
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