Evaluation of a four sensor array used in a wall-jet configured flow cell for plow injection potentiometry

Photo-cured calcium, potassium, and nitrate ion-selective electrodes and Ag /AgCl wire as a chloride electrode have been integrated into a sensor array that is suitable for FIP measurements in a wall-jet flow cell. Each sensor in the electrode-array exhibited near-Nemstian response over a log-linear range between 0.1 mM and 10 mM and detection limits of 0.01 mM in the flow injection potentiometric mode. The four coated wire electrodes were used si multaneously in the flow injection mode to determine their respective deter minand in various water samples and the results were in good agreement with standard analytical methods.