Article info.

ABSTRACT

Received 06 Jul 2018
Revised 15 Sep 2018

Accepted 29 Mar 2019

Ion–selective electrode (ISE) is a useful tool in the direct determination of ionic species in complex samples. This study relates to the manufacture of Ca²⁺–selective electrode with single–barrelled microelectrodes and an internal filling solution buffered for pCa (pCa= –lg[Ca²⁺]) of 6. It is shown that an improved lower detection limit of 10^–6 M is obtained in Ca²⁺ buffer solution and the changes in electromotive force between two solutions of 10–fold change in Ca²⁺ concentration are close to 30 mV/decade.

Keywords

Cocktail A, EGTA, EMF, ISE, microelectrodes, SICM

Cited as: Dat, N.V., Tuan, H.T. and Purwadi, R., 2019. The preparation of Ca²⁺–selective electrodes. Can Tho University Journal of Science. 11(1): 60-63.