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首页> 外文会议>International Symposium on Chemical and Biological Sensors and Analytical Methods II, 2001 >COMPARING DIFFERENT APPROACHES FOR ASSEMLBING SELECTIVE ELECTRODE FOR MERCURY IONS
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COMPARING DIFFERENT APPROACHES FOR ASSEMLBING SELECTIVE ELECTRODE FOR MERCURY IONS

机译：比较组装汞离子选择电极的不同方法

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摘要

Different approaches for increasing the sensitivity, selectivity and stability of a voltammetric probe for mercury ions have been probed. These involve the application of adsorbed monolayers of a host molecule, i.e., 4,7,13,16,21,24-hexaoxa-1, 10-diazabicyclo[8.8.8]hexacosane (Kryptofix-222) and thin polymeric films. The stability, reproducibility and durability of the sensors in the analysis of Hg~(2+) from different sources have been examined and compared. We found that a monolayer of the macrocyclic ligand, which is capable of forming a strong and selective complex with the mercury, is superior to polymeric films in terms of sensitivity and ease of regeneration. On the other hand, the stability and durability of polymeric films, in which Kryptofix-222 is incorporated, will eventually dictate their use as preferred interfaces for repetitive analyses especially in flow analysis systems. An application of a polymer-Kriptofix-222 modified electrode for monitoring mercury in a bioremediation pilot has been examined using an automatic sequential-injection stripping analysis (SISA) system.
机译：已经探索了用于增加伏安法探针对汞离子的灵敏度，选择性和稳定性的不同方法。这些包括应用吸附的分子单分子层，即4,7,13,16,21,24-hexaoxa-1、10-二氮杂双环[8.8.8]己二十烷（Kryptofix-222）和聚合物薄膜。对不同来源的Hg〜（2+）进行分析时，对传感器的稳定性，再现性和耐用性进行了检查和比较。我们发现，能够与汞形成强而有选择性的配合物的大环配体单层在敏感性和易于再生方面优于聚合物薄膜。另一方面，其中掺入了Kryptofix-222的聚合物薄膜的稳定性和耐久性最终将决定它们作为重复分析的首选界面的用途，尤其是在流动分析系统中。已使用自动顺序注射溶出分析（SISA）系统检查了聚合物Kriptofix-222修饰电极在生物修复试验中监测汞的应用。

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