| 冠醚涂层压电石英晶体传感器对甲苯、二甲苯的检测研究 |
| 摘要点击 713 全文点击 940 修订日期：1993-05-18 |
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| 中文关键词 冠醚 压电晶体 甲苯 二甲苯 |
| 英文关键词 crown ether piezoelectric crystal toluene xylene |
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| 中文摘要 |
| 根据冠醚化合物的结构特点和主-客体分子适应原理以及选择性吸附中性分子的特性,本文首次选用冠醚作为压电晶体传感器的敏感涂层。对甲苯和二甲苯进行检测研究,显示出良好的吸附可逆性和较高的灵敏度。稳定性、重现性好,线性响应范围较宽,对石油裂解气中低分子烃类及低浓度的CO2、SO2和NH3都不产生干扰作用。 |
| 英文摘要 |
| The vibrational frequency of a piezoelectric crystal will be decreased as a gaseous pollutant is absorbed on its coat, and under the test conditions, the decrease of frequency is propotional to the concentration of the gas. In this paper, three of the crown ethers were used as a coat for monitoring toluene and xylene first, and they can selectively adsorb the particular gas, the concentration of that gas can be determined quantitatively. The absorption-desorption is reversible process rapidly,the response sensitivity is quite good. The low molecular hydrocarbons do not interfere with this determination. |
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