钳状杯[4]芳烃为探针的固态PVC膜汞离子选择性电极  

A Solid-state Ion-selective Electrode for Mercury with Tweezer-type Calix[4]arene Derivative as the Probe on PVC Film

作　　者：吕鉴泉[1] 曾宪顺[2] 艾娟[3] 庞代文[1] 

机构地区：[1]武汉大学化学与分子科学学院,武汉430072 [2]南开大学元素有机化学国家重点实验室,天津300071 [3]湖北师范学院化学系,黄石435002

出　　处：《高等学校化学学报》2005年第2期238-240,共3页Chemical Journal of Chinese Universities

基　　金：中国博士后基金 (批准号 :2 0 0 2 0 3 2 2 11);湖北省教育厅科研基金 (批准号 :2 0 0 2 Z0 0 0 4)资助

摘　　要：A new solid-state mercury ion-selective electrode was prepared by directly coating the surface of a glassy carbon electrode with tetrahydrofuran solution containing PVC, 25,27-dihydroxy-26,28- bis[(1′-naphthalene) selenopropoxy] calix[4]arene, dioctyl phthalate and potassium tetrakis(4-chlorophenyl) borate. The response of the electrode is linear with a good Nernstian slope of 31.5 mV/decade over an Hg 2+ ion concentration range of 5.0×10 -9—5.0×10 -2 mol/L and a detection limit of 1.0×10 -9 mol/L. The response time to achieve a 95% steady potential for Hg 2+ detection is less than 30 s, and the electrode is suitable for use within the pH range of 2—4. The selectivity for Hg 2+ relative to several alkali, alkaline earth, transition and heavy metal ions is good. The mechanism of the potential response of this system was also discussed.A new solid-state mercury ion-selective electrode was prepared by directly coating the surface of a glassy carbon electrode with tetrahydrofuran solution containing PVC, 25,27-dihydroxy-26,28- bis[(1′-naphthalene) selenopropoxy] calix[4]arene, dioctyl phthalate and potassium tetrakis(4-chlorophenyl) borate. The response of the electrode is linear with a good Nernstian slope of 31.5 mV/decade over an Hg 2+ ion concentration range of 5.0×10 -9—5.0×10 -2 mol/L and a detection limit of 1.0×10 -9 mol/L. The response time to achieve a 95% steady potential for Hg 2+ detection is less than 30 s, and the electrode is suitable for use within the pH range of 2—4. The selectivity for Hg 2+ relative to several alkali, alkaline earth, transition and heavy metal ions is good. The mechanism of the potential response of this system was also discussed.

关 键 词：杯芳烃 固体PVC膜 离子选择性电极 汞离子 

分 类 号：O657[理学—分析化学]