| 微波溶解光度法测定茶叶中痕量锗 |
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| 引用本文： | 郎春燕,汪模辉,林郑和.微波溶解光度法测定茶叶中痕量锗[J].理化检验(化学分册),2002,38(10):502-503,508. |
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| 作者姓名： | 郎春燕 汪模辉 林郑和 |
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| 作者单位： | 成都理工大学,应化系,成都,610059 |
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| 摘 要： | 采用微波加热和双层聚四氟乙烯密闭容器，以HNO3－HClO4为消解试剂、MgO为外层吸收剂，用CCl4萃取，光度法快速测定茶叶中痕量锗。研究了消化茶叶的最佳条件。萃取锗的最佳酸度及其它影响因素。该方法具有选择性高，成本低等特点，其精密度和准确度令人满意。
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| 关 键 词： | 测定 光度法 微波溶解 茶叶 锗 痕量分析 |
| 文章编号： | 1001-4020(2002)10-0502-02 |
PHOTOMETRIC DETERMINATION OF TRACE AMOUNTS OF GERMANIUM IN TEA - DISSOLUTION OF SAMPLES IN MICROWAVE OVEN |
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| LANG Chun-yan,WANG Mo-hui,LIN Zheng-he.PHOTOMETRIC DETERMINATION OF TRACE AMOUNTS OF GERMANIUM IN TEA - DISSOLUTION OF SAMPLES IN MICROWAVE OVEN[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,2002,38(10):502-503,508. |
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| Authors: | LANG Chun-yan WANG Mo-hui LIN Zheng-he |
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| Abstract: | It was reported that the tea samples were rapidly dissolved in a double-layer, hermetically-sealed teflon vessel with an acid mixture of HClO 4 and HNO 3 heated in a microwave oven. In the outer wall of the vessel, some magnesium oxide was placed to absorb the residual nitric acid. The germanium in hydrochloric acid solution was separated by extraction with CCl 4, and was re-extracted with water. Finally the germanium was determined photometrically by the phenylfluorone method. The conditions for the micro-wave dissolution and for the CCl 4 extraction were optimized. The proposed method was proved to be satisfactory either in selectivity, precision and accuracy. |
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| Keywords: | Photometry Dissolution Micro-wave heating Tea Germanium |
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