Abstract
A new, efficient calcium ion selective electrode has been prepared using mono ester and polyvinyl chloride. The electrode showed Nernstian response in the concentration range of 1 M to 1 x 10 -4 M with detection limits in the order of 10 -4 M. The stable potentiometric signals are obtained within a short time period of 1 min. The effect of pH and the effect of medium have been studied and found to give a better response. Selective coefficient values were evaluated using fixed interference method. The sensor was applied as an indicator electrode for potentiometric titrations of Ca(II) ions with EDTA and also for the determination of calcium in milk and water samples.
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