An all-solid-state silicate ion-selective electrode using pbsio 3 as a sensitive membrane

Abstract

Ion-selective electrode (Ise) is an emerging technology for in situ monitoring of the chemical concentrations of an aqueous environment. in this work, we reported a novel all-solid-state silicate ise, using an ag/pb/pbsio 3 electrode. this electrode responded to aqueous sio 32− with a reasonable slope of −31.34 mv/decade and a good reproductivity. the linear range covered from 10 −5 m to 10 −1 m, for the na 2 sio 3 solutions and the response time was generally less than 5 s. its potentiometric response to ph and silicate indicated that the prepared electrode was sensitive to silicate, rather than ph. compared to the traditional liquid ise, our all-solid-state silicate electrode was resistant to high pressure and could be used in situ, in deep water. in addition, the miniaturized electrodes (diameter of 0.4 mm and a length of 2–3 cm) could be easily integrated into a multi-modal sensor, which could simultaneously determine multiple parameters. our prepared silicate ise could potentially be used to determine the presence of silicate in a low-chloride aqueous environment, where the ise exhibited better selectivity for silicate, over interfering ions such as, so 42− , no 3− , ch 3 coo − , co 32− , and po 43− .