对铂基质有机碘修饰BLM碘离子传感器性能的影响因素研究

STUDY ON THE INFLVENCE FACTORS OF THE PROPERTIES OF IODIDE ION-SENSOR BASED ON MODIFIDED BLM WITH AHTI ON pt SUPPORT

本文研究了使用酸度、成膜时间以及BLM形成液的使用寿命对铂基质十六烷基三辛基碘化扶修饰BLM碘离子传感器性能的影响．结果表明，在20±2℃环境温度下，该传感器膜的形成时间为4～5min；在pH为5．0～10．0酸度范围内对碘离子具有好的响应．以0．1mol／LNaCl为底液，其线性范围为10－6～10－2mol／L[I-]，响应斜率为57mV／pC，符合能斯特响应．BLM形成液在三个月内使用无明显变化．

In this paper,three main influence factors have been researched on the properties of iodide ion-sensor based on modified Bilayer Lipid Membrance(BLM) with ammonium hexadecanoyltrioctyl trioctyl iodide(AHTI) on Pt support:the range of acidity in use thesensor,the formation time of the BLM and the used lifetime of the BLM formation liquid. Inthe solution of pH 5. 0～10. 0,the sensor shows linear potentiometric response for iodide ionin the concentration range of 10-6～10-2 mol/L with a slope of 57 mV/pC and a detectionlimit of 10-6mol/L in the background liquid of 0. 1 mol/L NaCl. The membrance formationtime is 4～5 min in the background temperature 20±2℃. There is no change of the responsecharacteristic of the sensor made from the BLM formation liquid within three months.