溶胶-凝胶膜修饰碳酸根离子选择电极的研究  

Study on a carbonate ion selective electrode modified by sol-gel

作　　者：杜宝中[1] 路蕾蕾[1] 刘佳[1] 

机构地区：[1]西安理工大学应用化学系,西安710048

出　　处：《分析试验室》2010年第10期1-4,共4页Chinese Journal of Analysis Laboratory

基　　金：陕西省工业攻关计划项目(2009K08-17)资助

摘　　要：利用溶胶-凝胶技术包埋电活性物质,制备溶胶-凝胶膜修饰的碳酸根离子选择电极。探索了Sol-Gel膜修饰CO32-选择电极的制备方法、测试条件及共存物的影响。电极的线性范围1.0×10-1~1.0×10-5mol/L,相关系数R2=0.993,检测限8.9×10-6mol/L,响应斜率22.1 mV/pCO3。电极稳定性和重现性良好,用于实际样品测定,回收率95.9%~99.0%。A new type of ion-selective electrode for determination of carbonate was prepared based on the sol-gel technique and embedding AgNO3.The preparation method,measurement conditions and the effect of other substances were studied in detail.The Nernst responses to the concentration of carbonate ion were obtained in the range of 1.0×10-1～1.0×10-5 mol/L with the correlation coefficient of 0.993 and a slope of 22.1 mV/pCO3 in pH9.2 buffer solution of H3BO3 and the detection limit was 8.9×10-6 mol/L.It has been applied to determination of CO32-in samples and the recoveries were 95.9%～99.0%.

关 键 词：溶胶凝胶 碳酸根 离子选择电极 

分 类 号：O657.1[理学—分析化学]