A novel silver(I)-selective PVC membrane sensor and its potentiometric applications

Authors : Ömer IŞILDAK, Nihal DELİGÖNÜL, Oğuz ÖZBEK

Pages : 1149-1158

View : 14 | Download : 6

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Silverinsert ignore into journalissuearticles values(I);-selective sensors were prepared from a solid-state contact polyvinyl chloride insert ignore into journalissuearticles values(PVC); membrane. insert ignore into journalissuearticles values($Z);$-2-insert ignore into journalissuearticles values(2-insert ignore into journalissuearticles values(insert ignore into journalissuearticles values(3-insert ignore into journalissuearticles values(2-hydroxyphenyl);-5-insert ignore into journalissuearticles values(p-tolyl);-1$H$-pyrrol-2-yl);imino);-5-insert ignore into journalissuearticles values(p-tolyl);-2$H$-pyrrol-3-yl);phenol was synthesized as an ionophore molecule and embedded in the silverinsert ignore into journalissuearticles values(I);-selective PVC membrane composition. The optimum membrane composition was determined as 2.5% ionophore, 61.7% bis-insert ignore into journalissuearticles values(2-ethylhexyl);sebacate, 1.0% potassium tetrakis insert ignore into journalissuearticles values(p-chlorophenyl); borate, and 34.8% PVC. The developed sensor exhibited a linear potential change $E$ = 67.42 insert ignore into journalissuearticles values(-log [Ag$^{+}$]); $+$ 1152.9 and $R^{2}$ = 0.9960); in the varying concentration range of 1.0 $\times $ 10$^{-1}$ to 1.0 $\times $ 10$^{-5}$ mol L$^{-1}$ silver ions. This sensor shows a detection limit of 7.3 $\times $ 10$^{-7}$ mol L$^{-1}$. The proposed sensor showed a good potential change with high sensitivity even in a wide range of pH values insert ignore into journalissuearticles values(2.0-11.0);. The proposed sensor had a quick electrochemical response of less than 3 s with good selectivity and repeatability. The sensor was also successfully applied in the analysis of real water samples. In real water samples prepared by standard addition method, recoveries in the range of 82.30%-95.15% were obtained.
Keywords : Potentiometric sensor, PVC membrane, silver I, selective, silver determination