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KMID : 1024519960050020211
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Journal of the Environmental Sciences
1996 Volume.5 No. 2 p.211 ~ p.220
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Hg(II) ion- Selective Electrodes with Neutral Carriers of Macrocycles
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Jung Oh-Jin
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Abstract
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New thin-and diselena-crown ethers containing two suffer and selenium donor atoms have been prepared. And then, mercury () ion-selective electrodes with PVC-plasticizer (STPB) based on some macrocycles as neutral carriers were also made. The electrochemical selectivities for various ions, and the effects for macrocycles, matrix of membranes, ratio of plasticizer to macrowcles, concentration and pH of test solution were investigated on the ion-selective electrodes. The 1, 10-diselena-18-crown-6-PVC-STPB (sodium tetraphenylborate) exhibited good linear responses of decade-1 for ion in the conientration ranges of M ion. This electrode exhibited comparatively good selectivities for ion in comparison with alkali and alkaline earth metal ions, some heavy metal ions and rare earth metal ion in the range of pH 2.5~6.0. In addition, this electrode was applied as a sensor in the titration of ion with ion in water.
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KEYWORD
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thia, diselena crown ether, Hg ion selective electrode, PVC-plasticizer responses, neutral carriers, titration nerstian skpe
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