| 流动注射化学发光法测定茶叶中的茶多酚 |
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| 引用本文： | 米娟,王九春,马永钧,刘彩云,周敏.流动注射化学发光法测定茶叶中的茶多酚[J].宁夏大学学报(自然科学版),2011,32(2):168-171. |
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| 作者姓名： | 米娟 王九春 马永钧 刘彩云 周敏 |
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| 作者单位： | 西北师范大学化学化工学院,甘肃兰州730070;西北师范大学肃省高分子材料重点实验室,甘肃兰州730070;西北师范大学省部共建生态环境相关高分子材料教育部重点实验室,甘肃兰州730070 |
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| 基金项目： | 甘肃省自然科学基金资助项目(1010RJZA017) |
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| 摘 要： | 建立流动注射化学发光（FI-CL）法测定茶叶中茶多酚的新方法.优化实验条件下,在ρ=1.0×10-8~5.0×10-6g/mL,相对发光强度的对数值与茶多酚浓度的对数值呈良好线性关系,检出限为2.0×10-9g/mL（3σ）,相对标准偏差为2.0%（ρ（茶多酚）=1.0×10-6g/mL,n=10）.该方法用于红茶、绿茶、花茶及铁观音茶中茶多酚含量的测定,加标回收率为95.4%~108.3%,与国家标准测定方法做对比,结果令人满意.可用于食品中其他酚类物质的分析、检测.
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| 关 键 词： | 流动注射 化学发光 高良姜素 高锰酸钾 茶多酚 |
Determination of Tea Polyphenols in Tea Samples by Flow-Injection Chemiluminescence |
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| Mi Juan,Wang Jiuchun,Ma Yongjun,Liu Caiyun,Zhou Min.Determination of Tea Polyphenols in Tea Samples by Flow-Injection Chemiluminescence[J].Journal of Ningxia University(Natural Science Edition),2011,32(2):168-171. |
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| Authors: | Mi Juan Wang Jiuchun Ma Yongjun Liu Caiyun Zhou Min |
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| Institution: | Mi Juan1,2,3,Wang Jiuchun1,Ma Yongjun1,Liu Caiyun1,Zhou Min1,3(1.Key Laboratory of Polymer Materials of Gansu Province,Northwest Normal University,Lanzhou 730070,China,2.Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education,3.College of Chemistry & Chemical Engineering,China) |
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| Abstract: | A novel flow-injection chemiluminescence（FI-CL） for the determination of tea polyphenols was developed based on the chemiluminescence reaction of tea polyphenols in the galangin-potassium permanganate-polyphosphoric acid system.Under the optimized conditions,the obtained linear range was 1.0×10-8-5.0×10-6 g/mL,with a detection limit of 2.0×10-9 g/mL（3σ）.The relative standard deviation（RSD） for the determination of 1.0×10-6 g/mL tea polyphenols was 2.0 %（n=10）.The proposed method has been used to determine the contents of tea polyphenols in Green tea,Black tea,Scented tea and Tie Guan Yin tea with recoveries in the range from 95.4% to 108.3 %.The determination of tea polyphenols in tea samples by this method showed satisfactory results comparable with National Standard.It can be used for other phenolic compounds in food anahfsis and tesing. |
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| Keywords: | flow-injection chemiluminescence galangin potassium permanganate tea polyphenols |
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