安徽农业科学2012，Vol.40Issue(3)：1445-1447,3.
超声波萃取-离子选择电极法测定茶叶中氟含量
Determination on Fluoride Content in Tea by Ultrasonic Extraction and Ion-selective Electrode Method
摘要
Abstract
[Objective] The study aimed to determine the fluorine content in the tea from the part areas of Guizhou Province by using the ultrasonic extraction and ion-selective electrode method.[Method] The fluorine content in the whole leaf, tea powder and the extract in 6 kinds of tea in the part area of Guizhou Province were measured by using the ultrasonic extraction and ion-selective electrode method and the effects of different soaking times, soaking temperature and soaking time on the fluorine leaching rate in 3 of 6 kinds of tea were studied.[Result] The fluorine contents in the selected tea samples in different area of Guizhou Province were 46.24 - 121.77 mg/kg, which didn' t exceed the agriculture industry standard in China. The fluorine content in the extract was increased with the increment of the ultrasonic time and the leaching rate of the fluorine was greatest when the ultrasonic extraction time was 30 min. The size of tea had no obvious effect on the extraction of the fluorine ion. The fluorine concn. Was decreased orderly with the increment of the soaking times and the leaching rate of the fluorine was enhanced with the increment of soaking temperature and soaking time.[Conclusion] It shouldn' t drink a lot of the tea with high-fluorine content as possible as one can, at same time, it should avoid making tea for long time so as to prevent the excessive dissolution of the fluorine in the tea.关键词
茶叶/氟含量/超声波萃取/离子选择电极/氟浸出率Key words
Tea/ Fluorine content/ Ultrasonic extraction/ Ion-selective electrode/ Fluorine leaching rate分类
农业科技引用本文复制引用
王娅,陈伯涛,姚福荣,严敏,宝冬梅..超声波萃取-离子选择电极法测定茶叶中氟含量[J].安徽农业科学,2012,40(3):1445-1447,3.基金项目
贵州民族学院科研基金资助项目. （）
