Study Of Chemically Modified Carbon Paste Electrodes And Their Application In Metal Ions

This thesis is mainly centered on preparing chemically modified carbon paste electrodes with several different modifiers. These sensors have been applied to analysis of different metal ions. Details are presented in this thesis as follows:1,The modified carbon paste electrode with EDTA as the modifier has been prepared based Cu²⁺ and EDTA can formed complex compound and Cu²⁺ in the electrolytic liquid can enriched on the modified electrode surface. The sensor shows satisfactory virtues in reversibility, repeatability, relestivity and sufficient lifetime.2,Using H2O2, DMF, mixed acerbity and acidify after pellets four different kind of methods to sublimate carbon nanotubes. Then, the modified carbon paste electrode with purification of carbon nanotubes as the modifier has been prepared in determining metal ions. Comparison the results, obtained the ideal purification methods.3,Prepare the EDTA and Carbon nanotubes modified carbon paste electrodes based EDTA and Cu²⁺ can formed complex compound and carbon nanotube with hollow special structure and strong adsorption effect can absorb Cu²⁺ on the modified electrode surface. The sensor can accelerate electrochemical reactions and make the react more completely. Finally get a good effect in determining actual water by the sensor.4,The modified carbon paste electrode with EDTA–Cu(â…¡) complexes as the modifier has been prepared based EDTA–Cu(â…¡) complexes can react with Cd2+ exist in solution and with the reaction to determine cadmium ions in solution.