| 用硅烷化处理改性硅胶分离富集痕量元素 |
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| 引用本文： | 李友华,何应律.用硅烷化处理改性硅胶分离富集痕量元素[J].分析化学,1994,22(8):812-815. |
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| 作者姓名： | 李友华 何应律 |
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| 作者单位： | 中国地质大学应用化学系 武汉430074
(李友华，何应律，赵中一，滕艳)，中国地质大学应用化学系 武汉430074(赵锦端) |
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| 摘 要： | 将硅胶用二氯二甲基硅烷处理后，能降低硅胶对极性物质的吸附，增加其对非极性物质或弱极性物质如５－Ｂｒ－ＰＡＤＡＰ等大多数螯合剂的吸附，同时使改性硅胶适应的ＰＨ范围扩宽，对金属离子的净化学吸附增大，使用寿命增加。
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| 关 键 词： | 硅烷化 改性硅胶 富集 痕量元素 |
Enrichment of Trace Elements With Silica Gel Modified by Silanizing Treatment |
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| Li Youhua,He YingLu,Zhao Zhongyi,Teng Yan. Zhao Jinduan.Enrichment of Trace Elements With Silica Gel Modified by Silanizing Treatment[J].Chinese Journal of Analytical Chemistry,1994,22(8):812-815. |
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| Authors: | Li Youhua He YingLu Zhao Zhongyi Teng Yan Zhao Jinduan |
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| Abstract: | After treating the silica with dichloro-dimethyl silane (DDS), the physical adsorption amount of metallic ions on it decreased about 40%. And that of polar chelant ni-troso-R-salt decreased more than 30%. But that of weak polar chelant 2-(5-bromo-pyridyla-zo)-5-diethyl-amino phenol (5-Br-PADAP) raised 30% , The applied range of pH of modified silica gel with 5-Br-PADAP-SG) treated with DDS is extended from 1-7 to 1-9. The net chemical adsorption amount of metallic ions on 5-Br-PADAP-SG Raised 30%. The silanizing treatment to silica gel can greatly improve the physical and chemical characters of silica gel. The treatment can also affect the enrichment of trace metallic ions. |
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| Keywords: | Silanizing Modified silica gel Enrichment Trace elements |
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