TY - JOUR

T1 - Anion-selective light-addressable potentiometric sensors (LAPS) for the determination of nitrate and sulphate ions

AU - Mourzina, Yu G.

AU - Ermolenko, Yu E.

AU - Yoshinobu, T.

AU - Vlasov, Yu

AU - Iwasaki, H.

AU - Schöning, M. J.

PY - 2003/6/1

Y1 - 2003/6/1

N2 - The technology of fabrication of anion-selective light-addressable potentiometric sensors (LAPS) by using a solid-state microelectronic device integrated with an ion-recognition membrane has been elaborated. The nitrate sensor with ion-exchange membrane exhibits a linear response interval of 3 × 10-5 to 1 × 10-1 mol/l NO3- with an ionic sensitivity of 58 ± 2mV/pNO3. The detection limit was found to be 1 × 10-5 mol/l of nitrate ions and the working pH interval of the sensor is 2.0-11 for 10-2 mol/l NO3-. The sensor has a high selectivity for nitrate over chloride, sulphate, hydrogen phosphate and acetate ions with selectivity coefficients, KNO3/X, of 7 × 10-3, 1 × 10-3, 2 × 10-4 and 5 × 10-3, respectively, and a response time of about 1 min. The SO4-LAPS with polymeric membrane containing neutral sulphate ionophore demonstrates a sensitivity of 26 ± 1 mV/pSO4 in a concentration range of 3 × 10-6 to 1 × 10-2mol/l with a reasonable selectivity over chloride, hydrogen carbonate and hydrogen phosphate ions. Selectivity coefficients, KSO4/X, were found to be 0.6, 0.15 and 0.03, respectively.

AB - The technology of fabrication of anion-selective light-addressable potentiometric sensors (LAPS) by using a solid-state microelectronic device integrated with an ion-recognition membrane has been elaborated. The nitrate sensor with ion-exchange membrane exhibits a linear response interval of 3 × 10-5 to 1 × 10-1 mol/l NO3- with an ionic sensitivity of 58 ± 2mV/pNO3. The detection limit was found to be 1 × 10-5 mol/l of nitrate ions and the working pH interval of the sensor is 2.0-11 for 10-2 mol/l NO3-. The sensor has a high selectivity for nitrate over chloride, sulphate, hydrogen phosphate and acetate ions with selectivity coefficients, KNO3/X, of 7 × 10-3, 1 × 10-3, 2 × 10-4 and 5 × 10-3, respectively, and a response time of about 1 min. The SO4-LAPS with polymeric membrane containing neutral sulphate ionophore demonstrates a sensitivity of 26 ± 1 mV/pSO4 in a concentration range of 3 × 10-6 to 1 × 10-2mol/l with a reasonable selectivity over chloride, hydrogen carbonate and hydrogen phosphate ions. Selectivity coefficients, KSO4/X, were found to be 0.6, 0.15 and 0.03, respectively.

KW - Anion selectivity

KW - Light-addressable potentiometric sensor (LAPS)

KW - Nitrate

KW - Polymeric membrane

KW - Sulphate

UR - http://www.scopus.com/inward/record.url?scp=12444333160&partnerID=8YFLogxK

U2 - 10.1016/S0925-4005(03)00063-7

DO - 10.1016/S0925-4005(03)00063-7

M3 - Article

AN - SCOPUS:12444333160

VL - 91

SP - 32

EP - 38

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

SN - 0925-4005

IS - 1-3

T2 - 9th International Meeting on Chemical Sensors

Y2 - 7 July 2002 through 10 July 2002

ER -