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1. 发明授权

US4400243A Monitoring of heavy metal ions, electrode therefor and method of making a membrane sensitive to heavy metal ions 失效
标题翻译：监测重金属离子，电极及其对重金属离子敏感的方法
公开(公告)号：US4400243A
公开(公告)日：1983-08-23
申请号：US396283
申请日：1982-07-08
申请人： Leslie C. Ebdon , Brendan P. Hafferty
发明人： Leslie C. Ebdon , Brendan P. Hafferty
IPC分类号： G01N27/333 , G01N27/30 , G01N27/46
CPC分类号： G01N27/333
摘要： A metal sulphide ionic membrane for use in monitoring heavy metal ions in solution comprises a mixture of at least four metal sulphides in relative proportions such that the membrane is capable of responding electrochemically to all of the corresponding metal ions when said ions are contained in solution, e.g. at concentrations in the range from 10.sup.-5 up to 1M. A preferred embodiment of the ionic membrane consists of a mixture of silver 15 to 65% by weight, cadmium 15 to 65% by weight, lead 30 to 65% by weight and copper 3 to 9% by weight sulphides. The ionic membranes are preferably prepared by co-precipitation of sulphides followed by hot pressing and may be detachably mounted in suitable electrodes, internal electrical connections made either by way of filling solutions or by direct connection, preferably biassed connection, of an internal conductor to the internal surface of the electrode pellet.
摘要翻译：用于监测溶液中重金属离子的金属硫化物离子膜包括至少四种相对比例的金属硫化物的混合物，使得当所述离子包含在溶液中时，膜能够电化学地对所有相应的金属离子进行电化学反应，例如浓度范围为10-5至1M。离子膜的优选实施方案由15至65重量％的银，15至65重量％的镉，30至65重量％的铅和3至9重量％的硫化物的混合物组成。离子膜优选通过硫化物共沉淀然后热压制备，并且可以可拆卸地安装在合适的电极中，内部电连接通过填充溶液或通过将内部导体直接连接（优选地偏压连接）电极颗粒的内表面。

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