Issue 4 (202), article 2


Cybernetics and Computer Engineering, 2020, 4(202)

I.V. SUROVTSEV1, DSc (Engineering), Senior Researcher,
Head of the Ecological Digital Systems Department

P.Y. VELYKYI1, PhD Student
Ecological Digital Systems Department

V.M. GALIMOVA2, PhD (Chemistry), Associate Professor,
Senior Lecturer,
Analytical and Inorganic
Chemistry and Water Quality Department

Veterinary Faculty

1International Research and Training Center of Information Technologies and Systems of the NAS of Ukraine and MES of Ukraine,
40, Acad. Glushkov av., Kyiv, 03187, Ukraine
2National University of Life and Environmental Sciences of  Ukraine,
17, str. Heroes of Defense, 17, bldg. № 2, of. 18, Kyiv, 03041, Ukraine


Introduction. The use of ionometric methods of chemical analysis allows to quickly determine the safety of drinking water and the concentration of electrolytes of body fluids in research in digital medicine.

The purpose of the paper is to develop an algorithm for processing data measuring alkali and alkaline earth metal concentrations by a new electrochemical method of chronoionometry, based on the use of the principles of direct potentiometry and ion-selective electrodes on the inversion chronopotentiometry device.

Methods. According to the algorithm, the potentials are read in time at a speed of 4 KHz, a constant potential value is determined and a chronopotentiogram is plotted to control stability. According to the linear dependence of the potential difference on the logarithm of the mass of the additives, the mass of the element is found in the sample solution and the values of the element concentrations are determined by the electrode characteristic.

Results. The method of chronoionometry was developed and testing was performed on the device of stripping chronopotentiometry “Analyzer SCP” for determining the concentrations of potassium, sodium and calcium in model aqueous solutions. Analytical system “Analyzer SCP” includes five electrochemical research methods: the method of stripping chronopotentiometry (SCP); pulse method SCP (PSCP); differential pulse method SCP (DPSCP); oxidative pulse method SCP (OPSCP); chronoionometric method (CHI). The algorithm for processing concentration measurement data by chronoionometry makes it possible to select specific potential measurements and not take into account unstable values. Measurements are performed by the method of multiple standard additives to ensure controllability of the analysis results.

Conclusions. The proposed method of chronoionometry improves the clarity and control of the stability of potential measurements, allows to choose specific values of additives when calculating concentrations, which increase the reliability and accuracy of measuring concentrations of chemical elements, expands the functionality of the device for stripping chronopotentiometry and makes it more versatile.

Keywords: ionometry method, concentration, ion-selective electrodes, stripping chronopotentiometry, drinking water quality, digital medicine.

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Received 07.09.2020