Papers by Keyword: Ion Selective Electrode

Abstract: 4-Sebacoylbis (1-phenyl-3-methyl-5-pyrazolone) (H₂SbBP) ligand has been successfully synthesized, characterized and used as ionophores in Nd (III) selective electrode, using polytetrafluoroethylene (PTFE) membranous as a support. Prior to use the PTFE membrane soaked ionophores 1.5% w/v in chloroform for 24 hours. The performance of electrode studied by seeing the influence of pH and concentration of KNO₃ as a buffer solution ionic strength. Variations in pH of the solution was set at pH ranges between 1 to 10 using a solution of HCl and NaOH, while KNO₃ concentration varied between 10^-4 to 10^-1 M. Nd³⁺ concentration range is between 10^-6 up to 10^-2 M. The best electrode performance was obtained at pH 5 and 10^-2 M KNO₃ concentration with a sensitivity of (18.5 ± 0.2) mV/decade and its response time less than 25 seconds.

Abstract: The existing conventional detection methods ofnitrate nitrogenmostly consume time, cost a lot of moneyand need professionals. This limits the application of soil testing and fertilization technology at the grass-roots level. Therefore, a kind of fast, low-cost and simple operated method of soil nitrate nitrogen is in urgent need. The research of measurement models based on electrochemical principles of soil nitrate nitrogen is carried out in this paper to the issue ofquick access to the information of soil nitrate nitrogen. The linear regression equation is used to establish the mathematical model of electrodes and the binary quadratic regression model is used to study the temperature correction mathematical model of electrodes and finally matlab is used for datasimulation.

Abstract: A design idea of calcium tester based on embedded platform is described. The composition of calcium test system is firstly analyzed. Secondly, in the acquisition of the potential signal of solution concentration the model of a sensor system is introduced. Finally the realization technique of tester is chiefly discussed in hardware and software.