Polysulfone as an alternative material to PVC in the design of ion-selective electrodes

Sulfonated poly(ether ether ketone), an ion conducting polymer, as alternative polymeric membrane for the construction of anion-selective electrodes

“…The previous research performed in our laboratories concerning both SPEEK polymer for cation sensing [16] and tetraoctylammonium ionophore for a nitrate selective electrode [8] allowed us to avoid the optimization of several known working parameters. On the one hand, SPEEK has been used as a polymeric matrix for NH 4 + -ISE and a concentration of 95 mg SPEEK/ml DMF was considered optimal for membrane preparation [16].…”

“…On the one hand, SPEEK has been used as a polymeric matrix for NH 4 + -ISE and a concentration of 95 mg SPEEK/ml DMF was considered optimal for membrane preparation [16]. On the other hand, the same ionophore was applied to a polysulfone membrane for a nitrate sensor [8] and we have taken advantage of the know-how choosing a membrane which contained NPOE as a plasticizer, and a final composition of 30% SPEEK, 65% plasticizer and 5% ionophore. …”

“…To cope with these inconveniencies, several polymeric matrices have been tested as alternatives to common PVC, like polysiloxanes [6] silicon rubber [7] and polysulfone [8], and recently some applications of electron conducting polymers in the design of potentiometic ion-sensors have been reviewed [9,10].…”

“…The widely used NO 3 − -ISE has been chosen as a model electrode to study the behavior of SPEEK as polymeric matrix of the membrane. The results obtained have been compared to those of a nitrate-selective electrode based in a polysulfone membrane [8].…”

Carbon nanotube/polysulfone screen-printed electrochemical immunosensor

“…Polysulfone (PSf) has been widely used in last years for different applications in chemistry (Baker, 2004), in membrane separation (Macanás and Muñoz, 2005) and in sensors field PrietoSimón and Fàbregas, 2006;González-Bellavista et al, 2006) Polysulfone is a polymer that shows high resistance in extreme pH conditions, good adhesion, the susceptibility to incorporate biological molecules and a good thermal stability. These properties, in addition to the good conductivity of MWCNT, make this a good composite for electrochemical detection.…”