p. C. WILHELMSEN, R. LUMRY AND H. EYRING 97 



the chemiluminescent reaction of luminol and molecular oxygen can be 

 employed as a means of measuring oxygen concentration. The intensity 

 of the light emitted is a function of the amount of oxygen dissolved. 

 The amount of oxygen dissolved can be related to the partial pressure 

 of oxygen in the gas being analyzed. This procedure can be used to 

 measure continuously the concentration of oxygen in flowing systems 

 over reasonable periods of time as the luminol is only slowly con- 

 sumed. The reaction of luminol with oxygen and an additional oxidant 

 such as ferricyanide should be adaptable to detecting extremely small 

 quantities of oxygen. 



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