Table 2: Formulation of the ion selective membranes employed in the construction of the potentiometric sensor array.

SensorPVC (%)Plasticizer (%)Recognition element (%)

33Butylpentyladipate (66)Nonactin (1)
K+30Dioctylsebacate (66)Valinomycin (3)a
Na+22Nitrophenyloctylether (70)Bis[(12-crown-4)methyl]-2-dodecyl-2-methylmalonate (6)a
H+33Dioctylsebacate (66)Tridodecylamine (1)a
Cl30Nitrophenyloctylether (65)Tetradodecylammonium chloride (5)
30Dibutylphtalate (67)Tetraoctylammonium nitrate (3)
Generic 129Dioctylsebacate (67)Dibenzo (18-crown-6) (4)
Generic 229Dibutylphtalate (65)Tetraoctylammonium bromide (4)

a The formulation includes potassium tetrakis(4-chlorophenyl)borate as an additive.