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1. 发明授权

US4961834A Electrochemical measuring cell for amperometrically determining ammonia and derivatives thereof 失效
标题翻译：用于电化学测定氨及其衍生物的电化学测量电池
公开(公告)号：US4961834A
公开(公告)日：1990-10-09
申请号：US448269
申请日：1989-12-11
申请人： Uwe Kuhn , Christiane Roocks , Herbert Kiesele
发明人： Uwe Kuhn , Christiane Roocks , Herbert Kiesele
IPC分类号： G01N27/404 , G01N27/416 , G01N27/49 , G01N33/00
CPC分类号： G01N27/4045 , G01N33/0054
摘要： The invention is directed to an electrochemical measuring cell for determining ammonia and its derivatives in a gaseous or liquid measuring sample. The measuring cell has at least one anode and at least one cathode which are disposed in an electrolyte chamber filled with a soluble electrolyte. The electrolyte chamber is closed off in the direction facing toward the measuring sample by a permeable membrane. The measuring cell provides a more selective ammonia sensor having the following advantages: a short response time, a linear response and exhibits the lowest possible tendency toward drift. The electrolyte of the measuring cell is so configured that the reaction products of the measuring reaction do not affect subsequent measurements. For this purpose the measuring cell, which operates in an amperometric measuring mode, contains a soluble non-oxidizable reagent in the electrolyte which reacts completely with ammonia to form an oxidizable product which is convertible by its oxidation into non-oxidizable soluble secondary products which are chemically and electrochemically inert.
摘要翻译：本发明涉及一种用于在气体或液体测量样品中测定氨及其衍生物的电化学测量池。测量池具有至少一个阳极和至少一个阴极，它们设置在填充有可溶性电解质的电解质室中。电解质室通过渗透膜在朝向测量样品的方向上封闭。测量池提供了更具选择性的氨传感器，其具有以下优点：响应时间短，线性响应，并且具有尽可能低的漂移倾向。测量池的电解质配置使得测量反应的反应产物不影响随后的测量。为此目的，以电流计测量模式运行的测量池在电解液中含有可与氨反应的可溶性不可氧化试剂，以形成可氧化产物，该产物可通过其氧化转化为不可氧化的可溶性次级产物，化学和电化学惰性。

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