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Development of a Dopamine-Aelective Optrode Membrane Based on a Lipophilic Hexaester of Calix [6] arene

Wang Kemin Huo Xiqin (Department of Chemistry and Chemical Engineering, Hunan Univ, Changsha, 410082)Chan Wing Houng Lee Albert Wai Ming(Department of chemistry, Hong Kong Baptist College, 224 waterloo Road, Kowloon, Hong Kong)  
A membrane for optically sensing dopamine based on plasticized poly (vinyl chloride)(PVC) containing a lipophilic hexaester of calix [6] arene, a hydrogen ion sensitive chromoionophore,and lipophilic anionic sites has been developed. This optrode membrane shows a high selectivity todopamine over the other catecholamines, such as adrenaline and noradrenaline. At pH 8.0, the absorb-Manuscript received on June 29, 1994 Supported by the National Natural Science Foundation of China and Chinese National Educational Committec Science Foundatian for Excellent Young Teachersance response shows a good correlat ion with the theoretically derived formula the measuring rangefrom 1×100 ̄(-5) to 1×10 ̄(-2)mol/L dopamine. Response behavior, reproducibility and lifetime of the optrodemembrane are discussed.
【CateGory Index】: Q73
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