TY - JOUR
T1 - Sulfonated poly(ether ether ketone), an ion conducting polymer, as alternative polymeric membrane for the construction of anion-selective electrodes
AU - González-Bellavista, Anna
AU - Macanás, Jorge
AU - Muñoz, Maria
AU - Fabregas, Esteve
PY - 2007/7/16
Y1 - 2007/7/16
N2 - A novel arrangement for polymeric membranes used in anion-selective electrodes is presented. Sulfonated poly(ether ether ketone) (SPEEK), an ion conducting polymer has been used as a polymeric matrix to build an anion-selective electrode (ISE). A NO3--ISE has been chosen as a model electrode to study the efficiency of the polymeric membrane. The effect of membrane composition and polymer compatibility with the electro-active components was investigated. The polymer matrix showed good mechanical properties and can be solvent cast in complete analogy to traditional ISE membranes. SPEEK matrix was studied in order to optimize both the potentiometric response and the selectivity of the electrode. The electrode exhibited a linear response with a slope of -51 mV per decade within the concentration range from 8.0 × 10-5 to 2.5 × 10-2 M nitrate ion. The detection limit was found to be 5.0 × 10-5 M, and electrodes could be used over a wide pH range of 4-8. Finally, the sensor showed improved selectivity in comparison to some of the previously reported nitrate-selective electrodes. © 2007 Elsevier B.V. All rights reserved.
AB - A novel arrangement for polymeric membranes used in anion-selective electrodes is presented. Sulfonated poly(ether ether ketone) (SPEEK), an ion conducting polymer has been used as a polymeric matrix to build an anion-selective electrode (ISE). A NO3--ISE has been chosen as a model electrode to study the efficiency of the polymeric membrane. The effect of membrane composition and polymer compatibility with the electro-active components was investigated. The polymer matrix showed good mechanical properties and can be solvent cast in complete analogy to traditional ISE membranes. SPEEK matrix was studied in order to optimize both the potentiometric response and the selectivity of the electrode. The electrode exhibited a linear response with a slope of -51 mV per decade within the concentration range from 8.0 × 10-5 to 2.5 × 10-2 M nitrate ion. The detection limit was found to be 5.0 × 10-5 M, and electrodes could be used over a wide pH range of 4-8. Finally, the sensor showed improved selectivity in comparison to some of the previously reported nitrate-selective electrodes. © 2007 Elsevier B.V. All rights reserved.
KW - Anion-selective electrode
KW - Ion conducting polymer
KW - Negatively charged membrane
KW - Nitrate
KW - SPEEK
U2 - 10.1016/j.snb.2007.01.051
DO - 10.1016/j.snb.2007.01.051
M3 - Article
SN - 0925-4005
VL - 125
SP - 100
EP - 105
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
IS - 1
ER -