An electrochemiluminescent electrode for use in {TAIL ~ apparatus} for monitoring the concentration of organic materials in {HEAD ~ water}, comprising: 
An electrochemiluminescent electrode for use in { TAIL ~ apparatus } for monitoring the concentration of organic materials in { HEAD ~ water } , comprising :
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH