“…The cocktails for the PVC-based sensor membrane consisted, for the cation-selective electrode, of 1.2% N,N,NA,NA-tetracyclohexyloxybis(o-phenyleneoxy)diacetamide (V163), 0.8% potassium tetrakis(4-chlorophenyl)borate, 65.3% o-nitrophenyl octyl ether and 32.7% PVC dissolved in tetrahydrofuran. 22 For the detection of anions, the liquid membrane cocktail used by Kondo et al was modified and contained 5.0% 5,10,15,20-tetraphenyl-21H,23H-porphin manganese(III) chloride (MnTPP), 1.0% tetradodecylammonium tetrakis(p-chlorophenyl)borate, 4.0% decan-1-ol, 60.0% o-nitrophenyl octyl ether and 30.0% PVC dissolved in THF. 23 All membrane components were purchased from Fluka (Buchs, Switzerland), except for the anion ionophore MnTPP, which was from Aldrich (Milwaukee, WI, USA).…”