| 茶叶氟化物提取方法对比与电位法测定条件优化 |
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| 引用本文： | 张显晨,郜红建,张正竹,宛晓春.茶叶氟化物提取方法对比与电位法测定条件优化[J].安徽农业大学学报,2011,38(1):27-30. |
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| 作者姓名： | 张显晨 郜红建 张正竹 宛晓春 |
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| 作者单位： | 安徽农业大学茶叶生物化学与生物技术教育部重点实验室; |
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| 基金项目： | 安徽省自然科学基金(090411009); 教育部科学技术研究重点项目(210097); 中国博士后基金(20090450800); 安徽省博士后基金(090411009)共同资助 |
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| 摘 要： | 对比茶叶氟化物提取方法,并对氟化物电位法测定条件进行优化。结果表明,不同提取方法对茶叶氟化物提取效率表现为水浴法(93.17%)>酸振荡提取(68.19%)>超声提取法(62.38%)。选用电位法测定茶叶氟化物线性范围在30～200 mg.kg-1之间,平均回收率为90.48%,相关系数R2为0.992 2,方法LOQ和LOD分别为54 mg.kg-1和18 mg.kg-1。采用此法分析了安徽省4种茶叶氟化物含量在52.26～73.80 mg.kg-1之间,低于农业部茶叶氟含量安全限量标准(≤200 mg.kg-1)。该研究结果为茶叶中氟化物含量的快速测定与茶叶质量安全性评价提供参考。
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| 关 键 词： | 茶叶 氟化物 提取方法 电位法测定 |
| 收稿时间： | 2010/4/28 0:00:00 |
Comparison of extraction methods and potentiometric determination of fluoride in tea |
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| ZHANG Xian-chen,GAO Hong-jian,ZHANG Zheng-zhu and WAN Xiao-chun.Comparison of extraction methods and potentiometric determination of fluoride in tea[J].Journal of Anhui Agricultural University,2011,38(1):27-30. |
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| Authors: | ZHANG Xian-chen GAO Hong-jian ZHANG Zheng-zhu and WAN Xiao-chun |
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| Institution: | ZHANG Xian-chen,GAO Hong-jian,ZHANG Zheng-zhu,WAN Xiao-chun(Key Laboratory of Tea Biochemistry & Biotechnology,Ministry of Education,Anhui Agricultural University,Hefei 230036) |
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| Abstract: | The different methods for extracting fluoride from tea were compared,and the potentiometric method for determining fluoride in tea liquid was optimized.The results showed that the recoveries with the boil-ing water extraction method(93.17%) were higher than those with the shaking extraction in acidic water(68.19%) and the ultrasonic extraction(62.38%).In this paper,the linear range of potentiometric determination of fluoride in tea was between 30 and 200 mg.kg-1,and the mean recovery was 90.48% with the squ... |
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| Keywords: | tea fluoride extraction method potentiometric determination |
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