Fluorimetric readout of ion-selective electrode potential changes

摘要: Abstract A novel method of quantitative optical readout potentiometric responses ion-selective electrodes is proposed. This idea was realized in a simple self-powered bipolar electrode system, with an pole directly connected the second pole, where fluorimetric signal generated. In this way, space and time separated sampling can be achieved. concept tested on model example system containing potassium-selective (ISE-K) polypyrrole solid contact, to zinc wire immersed solution. arrangement increase potassium ions activity solution results change membrane potential ISE-K, inducing reduction contact corresponding oxidation other component - zinc. Increase concentration read as emission intensity. Thus, allows situ determination, fluorescence intensity being linear function logarithm analyte turn-on mode. Moreover, due simplicity presence reactants phase, correlation between electrochemical behaviour confirmed indications for optimization could