Electrode assembly

Claim 1

IN AN ELECTROCHEMICAL TESTING APPARATUS, THE COMBINATION COMPRISING: A FIRST SALT BRIDGE TUBE ADAPTED TO HOLD A PREDETERMINED MAXIMUM LEVEL OF A FIRST SALT SOLUTION, SAID FIRST SALT BRIDGE TUBE HAVING A LOWER END PORTION SUBMERGIBLE IN A MEDIUM TO BE TESTED, SAID LOWER END PORTION INCLUDING LIQUID-JUNCTION MEANS ADAPTED TO DISCHARGE A MINUTE STREAM OF SAID FIRST SALT SOLUTION FROM WITHIN SAID TUBE INTO SAID SAMPLE MEDIUM; A SECOND SALT BRIDGE TUBE ADAPTED TO HOLD A PREDETERMINED MAXIMUM LEVEL OF A SECOND SALT SOLUTION HAVING AT LEAST ONE POLARITY OF ITS IONS OF DIFFERENT COMPOSITION THAN THE CORRESPONDING POLARITY IONS OF SAID FIRST SALT SOLUTION, SAID SECOND SALT BRIDGE TUBE HAVING A LOWER END PORTION, SAID LOWER END PORTION HAVING LIQUID-JUNCTION MEANS ADAPTED TO DISCHARGE A MINUTE STREAM OF SAID SECOND SALT SOLUTION; MEANS MOUNTING SAID LOWER END PORTION OF SAID SECOND SALT BRIDGE TUBE IN SAID FIRST SALT BRIDGE TUBE AND IN SEALING RELATIONSHIP THEREWITH; FIRST MEANS ESTABLISHING FLUID COMMUNICATION BETWEEN THE INTERIOR OF SAID FIRST SALT BRIDGE TUBE AND THE INTERIOR OF SAID SECOND SALT BRIDGE TUBE, SAID FIRST MEANS HAVING A LOWER END DISPOSED IN SAID FIRST SALT BRIDGE TUBE ABOVE SAID PREDETERMINED MAXIMUM LEVEL OF SAID FIRST SALT SOLUTION AND AN UPPER END ABOVE SAID PREDETERMINED MAXIMUM LEVEL OF SAID SECOND SALT SOLUTION; AND SECOND MEANS ESTABLISHING FLUID COMMUNICATION BETWEEN THE EXTERIOR AND THE INTERIOR OF SAID FIRST SALT BRIDGE TUBE, SAID SECOND MEANS HAVING AN OPEN END DISPOSED IN SAID FIRST SALT BRIDGE TUBE AT A POSITION BELOW SAID LOWER END OF SAID FIRST FLUID COMMUNICATION ESTABLISHING MEANS.