TY - JOUR
T1 - Polysulfone as an alternative material to PVC in the design of ion-selective electrodes
AU - González-Bellavista, Anna
AU - Macanás, Jorge
AU - Muñoz, Maria
AU - Fàbregas, Esteve
PY - 2006/6/26
Y1 - 2006/6/26
N2 - Polysulfone (PS), a non-conductive polymer, is employed as an alternative material to polyvinyl chloride (PVC), the most used polymer in the design of ion-selective electrode (ISE) membranes to date. A nitrate-ISE is chosen as a model electrode to study the efficiency of PS as a polymer matrix of the membrane. Tetra-octyl ammonium nitrate is used as ionophore and 2-nitrophenyl octyl ether as plasticizer. The polymer/plasticizer/ionophore ratio is optimized and the analytical performance parameters of the prepared electrodes are evaluated. The electrodes show a slope between 45 and 60 mV/decade (depending on the calibration medium and membrane composition). A linear range response between 1.0 × 10-4 and 3.0 × 10-2 M, and a lifetime of at least 1 month are obtained. The electrodes exhibit good selectivity for nitrate in respect to other anions. © 2005 Elsevier B.V. All rights reserved.
AB - Polysulfone (PS), a non-conductive polymer, is employed as an alternative material to polyvinyl chloride (PVC), the most used polymer in the design of ion-selective electrode (ISE) membranes to date. A nitrate-ISE is chosen as a model electrode to study the efficiency of PS as a polymer matrix of the membrane. Tetra-octyl ammonium nitrate is used as ionophore and 2-nitrophenyl octyl ether as plasticizer. The polymer/plasticizer/ionophore ratio is optimized and the analytical performance parameters of the prepared electrodes are evaluated. The electrodes show a slope between 45 and 60 mV/decade (depending on the calibration medium and membrane composition). A linear range response between 1.0 × 10-4 and 3.0 × 10-2 M, and a lifetime of at least 1 month are obtained. The electrodes exhibit good selectivity for nitrate in respect to other anions. © 2005 Elsevier B.V. All rights reserved.
KW - Ion-selective electrode
KW - Nitrate
KW - Polysulfone membrane
U2 - 10.1016/j.snb.2005.10.040
DO - 10.1016/j.snb.2005.10.040
M3 - Article
VL - 115
SP - 691
EP - 696
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
IS - 2
ER -