Analytical applications of liquid junction potential

Abstract

Analytical applications of the liquid junction potential. Abstract The results presented in this thesis reveal a marked improvement in the use of liquid junction potential which in most occasions is a bother in our electrochemical measurement. The liquid junction potential is encountered in many living and non-living systems. In all concentration cells there is a component arising from liquid junction. The concept of liquid junction is as old as the electrochemistry and in this research we have used the liquid junction as an analytical tool. The main work has been to develop a convenient method of setting up a cell that offers a straight forward liquid junction measurement. This cell is then used to study the variation of (liquid junction potential) with concentration and hence used this as an analytical probe by adopting the usual calibration curve method.The liquid junction potential was found to have a linear relationship with concentration. This enabled the use of the plot to obtain the concentration of unknown solution.The theoretical liquid junction was compared with observed one and they were found to be almost the same. An attempt was also made to make a cheaper F- responsive electrode. The result was positive as the electrode was more responsive towards the fluoride solutions.