Abstract
The article presents the results of potentiometric titration of the solution containing Ni (II) by the solution of sodium diethylditheocarbamate (NaDEDC). The possibilities of carbon composite electrode (CCE) and certain ion-selective and metal electrodes as the sensors for potentiometric determination of ions were investigated. The conditions for potentiometric titration of nickel (reagent, pH, composition of supporting solution, efficient electrode, effect of interfering ions) using sensors have been studied and optimized. The titration curves were processed by the linearization method which provide determination of equivalence point with high accuracy.
Highlights
Production of nickel is increasing every year due to rising rates of industry
Nickel ion selective electrode as a sensor for nickel ions determination is produced in industry, potentiometric titration method allows to expand the number of alternative working electrodes
One of the proposed electrode is a new electrochemical sensor, carbon composite electrode (CCE), which was previously shown to use in potentiometric determination of some heavy metals [9]
Summary
Production of nickel is increasing every year due to rising rates of industry. Nickel has very valuable properties this element is mostly used as an ingredient of steel and certain alloys, it finds wide application in the production of catalysts, batteries and in the electrical engineering industry. In this work the CCE, lead-, sulphide-, silver-ion selective electrodes (ISE), platinum and silver metal electrodes has been proposed as a sensors for the potentiometric titration of Ni (II). All titration curves were transformed into a linearity by the fragmentary linear approximation method in order to determine the equivalence point.
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