Study of the Sodium Ion Sensor Based on the SnO_2/ITO Glass and Detect Rinsing Solution for Contact Lens

摘要

This paper presents a sodium ion sensor device based on the SnO2/ITO glass structure. The weight ratio of this selective membrane is poly (vinyl chloride)(PVC): bis (2-ethylhexyl) sebacate (DOS): [(12-crown-4) methylmalonate (B12C4): sodium tetrakis (4-fluorophenyl) borate dehydrate (NaTFBD) = 33:66:2:2. In this condition, the sensor has a good linear sensitivity and a short response time. The experimental results show that the sensor has a linear sensitivity about 59rnV/dec in a concentration range between lO~-4M and 1M. Moreover, the presented sodium ion sensor is applied to detect rinsing solution for contact lens, and the measurement results show the good accuracy measured in the solution.