H. Mohan et Rm. Iyer, IN-SITU DETERMINATION OF HIGH HYDROGEN-ION CONCENTRATIONS IN AQUEOUS-SOLUTIONS USING A NAFION MEMBRANE CONTAINING RHODAMINE 6G, Analyst, 118(7), 1993, pp. 929-932
Based on the different optical absorption spectrum and fluorescence em
ission intensity of Rhodamine 6G in neutral and acidic solutions, a Na
fion membrane containing Rhodamine 6G was successfully employed to det
ermine indirectly high H+ concentrations (1-5 mol dm-3) in aqueous sol
utions in the temperature range 25-100-degrees-C.