聚硅氧烷复合膜改性pH玻璃电极的制备及对金属离子的响应  

Preparation and Response to Metal Ions of pH Glass Electrode Modified by Polysiloxane Composite Membranes

作　　者：孟令芝[1] 江娟[1] 吴进龙[1] 胡翎[1] 王齐[1] 李功强[1] 何永炳[1] 

机构地区：[1]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2003年第2期171-174,共4页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目 ( 2 0 0 72 0 2 9)

摘　　要：用溶胶 凝胶技术制备了两种新的含环状和非环状多酰胺的聚硅氧烷复合膜改性的 pH玻璃电极 .溶胶 凝胶溶液和由溶胶 凝胶涂覆的膜分别由透射电镜、傅立叶变换红外光谱和扫描电镜表征 .改性的pH电极玻璃膜对钠、钾、铜和铅离子的电位响应分别被测定 .结果表明以大环多酰胺作为离子载体改性的 pH电极玻璃膜对K+和Pb2 +有较高的电极响应 (分别为 43 .4,2 3 .6mV/级 ) ,在 1.0× 10 -1～ 5 .0× 10 -4Two new polysiloxane composite membranes containing cyclic and acyclic polyamides modified pH glass electrode were prepared by sol-gel technology. Sol-gel solution and membrane coated by sol-gel were characterized by TEM, FT-IR and SEM, respectively. The EMF response of modified pH glass electrode membrane toward Na +, K +, Cu 2+ and Pb 2+ was determined, respectively. The results show that the pH glass electrode membrane modified by macroxcyclepolyamide as ionophore exhibits high potential response toward K + and Pb 2+ (43.4 and 23.6 mV/decade, respectively) and a good linear relations in the range of 1.0×10 -1 to 5.0×10 -4 mol·L -1.

关 键 词：离子选择电极 pH坡璃电极 聚硅氧烷复合膜 制备 溶胶-凝胶技术 金属离子 电极响应 

分 类 号：O657.15[理学—分析化学]