“…In this type of solidcontact ISE, the conducting polymer is coated with a conventional ion-selective membrane, and the ion-selectivity is determined mainly by the ion-selective membrane. For example, potentiometric sensors based on a glassy carbon electrode covered with polyaniline and various thiacalix [4]arene ionophores have been developed and applied for the successful determination of Ag + ions [29]. Other configurations for solid-contact ISEs recently reported involve the use of carbon cloth coated with a conventional plasticized PVC-based K(+)-selective membrane [30], carbon nanotubes (CNTs) drop-coated with a K + -selective polyacrylic membrane [31], PVC-based molecularly imprinted polymers [32] and graphene coated with an ionophore-doped polymeric membrane [33].…”