Issue 1 (191), article 1

DOI:https://doi.org/10.15407/kvt191.01.005

Kibern. vyčisl. teh., 2018, Issue 1 (191), pp.

Surovtsev I.V., Dr (Engineering), Senior Researcher
Department of ecological digital systems
e-mail: dep175@irtc.org.ua , igorsur52@gmail.com
Galimov S.K., Postgraduate Student
Department of ecological digital systems
e-mail: dep175@irtc.org.ua
Tatarinov O.E., Researcher
Department of ecological digital systems
e-mail: dep175@irtc.org.ua
International Research and Training Center for Information Technologies
and Systems of the National Academy of Sciences of Ukraine
and Ministry of Education and Science of Ukraine,
Acad. Glushkov av., 40, Kiev, 03187, Ukraine

INFORMATION TECHNOLOGY FOR DETERMINING THE CONCENTRATION OF TOXIC ELEMENTS IN ENVIRONMENTAL OBJECTS

Introduction. Insufficient sensitivity of the existing systems of measuring low concentrations of chemical elements during the implementation of quality control of drinking water, food products and other natural objects, as well as the lack of necessary means for digital processing of weak signals of complex form, leads to the task of developing an effective information technology for determining the concentration of toxic elements.
The purpose of the article is to develop tools for information technology for determining the concentration of toxic elements. New methods of impulse inversion chronopotentiometry and ionometry to increase the sensitivity, reliability and functionality of the concentration measurement are used.
Methods. Transformation of data structure of the multi-component processes and new methods of a filtration and smoothing which are based on use of points of extremum and inflexion are applied at performance of digital processing of measurement signals. The transformation allows us to consider monotonically increasing signals of inversion as a linear sum of components, which are described by non symmetric functions of normal distribution. The received signal is simulated by solving the parametric identification problem in the class of one-dimensional regression models.
Results. The developed highly sensitive analytical system “Analyzer ICP” implements the created information technology. The system determines the mass concentration of 14 toxic elements (mercury, arsenic, lead, cadmium, zinc, copper, tin, nickel, cobalt, iron, manganese, selenium, iodine and chromium) with a sensitivity of up to 0.05 μg/dm3 (50 ppt) and six chemical elements (potassium, sodium, calcium, fluorine, ammonium and nitrates) in the range of 103 μg/dm3 to 6·107 μg/dm3 using ion-selective electrodes.
Conclusion. Information technology has an universal character, created tools can be used to analyze signals of various physical natures, in which the values are monotonically increasing or decreasing.

Keywords: transformation of the data structure, impulse chronopotentiometry, modelling, digital processing, information technolog.

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Received 12.12.2017