Oblon, Fisher, Spivak, McClelland & Maier
Method for determining ammonia and sensor therefor
 The concentration of ammonia in an aqueous liquid is determined by contacting a sample of the liquid with dissolved oxygen and with a microbial electrode comprising an oxygen-sensitive electrode, a porous membrane, and nitrifying bacteria confined or immobilised by the membrane which are in direct or close contact with the diaphragm of the electrode. The rate of oxygen consumption under otherwise uniform conditions is as precise a measure of concentration of ammonia as a conventional colorimetric method and distillation-titration method. 
Ajinomoto Company, Incorporated
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C12Q Y10T C12Q Y10S
inventional additional inventional additional
Takeo Isao Motohiko Tatsuru Shuichi
Yasuda Karube Hikuma Kubo Suzuki