固体接触式聚合物敏感膜电位型传感器检测海水中碳酸根  

Solid-contact polymeric membrane potentiometric sensors for determination of carbonate in seawater samples

作　　者：梅博杰 梁荣宁[2] 秦伟[2] 

机构地区：[1]浙江海洋大学,国家海洋设施养殖工程中心,舟山316022 [2]中国科学院烟台海岸带研究所,中国科学院海岸带环境过程重点实验室,山东省海岸带环境过程重点实验室,烟台264003

出　　处：《分析试验室》2017年第11期1255-1258,共4页Chinese Journal of Analysis Laboratory

基　　金：国家重点研发计划项目(2016YFC1400700)资助

摘　　要：以CO_3^(2-)为检测对象,发展了聚合物敏感膜电位型碳酸根传感器。采用3-辛基噻吩(POT)作为传导层的固体接触式电极技术,通过优化实验条件,构建了聚合物敏感膜CO_3^(2-)选择性电极,该电极对CO_3^(2-)检出限为7.0μmol/L,线性范围为1.0×10^(-5)~1.0×10^(-3)mol/L,能斯特响应斜率为-29.6 m V/decade。传感器已用于海水中CO_3^(2-)的测定。In our present work, polymeric membrane ion-selective electrodes for determination of carbonate are described. The electrodes are prepared by using poly （3-octyhhiophene） as the intermediate layer deposited by solvent casting on glassy carbon electrodes as a solid inner contact. Under the optimized conditions, the proposed membrane electrode exhibits Nernstian response to carbonate ion over the concentration range of 1.0 × 10^-5 to 1.0 × 10^-3 mol/L with a slope of -29.6 mV/dec. , and the detection limit is 7.0 μmol/L. The sensor also shows excellent selectivity and rapid response time. The potentiometric sensor has been successfully applied to determination of carbonate in real seawater samoles.

关 键 词：固体接触式聚合物膜离子选择性电极 碳酸根 海水 

分 类 号：X132[环境科学与工程—环境科学]