Volume: 1, 2022
1st International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland: ENVIRONMENT – PLANT – ANIMAL – PRODUCT
Abstract number: E010
DOI: https://doi.org/10.24326/ICDSUPL1.E010
Published online: 26 April 2022
ICDSUPL, 1, E010 (2022)
The nitrate SCISEs based on cobalt(II) complex with 4,7-diphenyl-1,10-phenanthroline
Karolina Pietrzak1*, Cecylia Wardak1
1 Department of Analytical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, M. Curie-Sklodowska Sq. 3, 30-031 Lublin, Poland
* Corresponding author: karolina.pietrzak@poczta.umcs.lublin.pl
Abstract
Ion-selective electrodes are the most popular group of potentiometric sensors, which are used to determine the content of various ions in liquid samples and can be successfully used to monitor the state of the natural environment. The basic structure of these electrodes consists of a discharge electrode, an ion selective membrane and an inner solution that provides the correct charge transfer mechanism between the membrane and the discharge electrode. In order to obtain sensors that are easier to miniaturize and modify their shapes and settings, the internal solution was eliminated, which in turn resulted in a deterioration of the stability and the reversibility of the potential by combining two materials with different kinds of conductivities. For this reason, it was necessary to use additional material, characterized by both ionic and electronic conductivity (so-called solid contact), which is aimed at improving the analytical parameters of the electrodes. The research on the use of the newly synthesized cobalt(II) complex with 4,7-diphenyl-1,10-phenanthroline as an active substance for the construction of ion-selective electrodes with solid contact was described. A number of sensors were made that differed in the composition of the ion-selective membrane, both in the content of the active complex and the type of ionic additive. Then, potentiometric measurements were performed in order to obtain electrode calibration curves, on the basis of which the slopes and linearity ranges as well as the detection limits of the sensors were determined. The selectivity of the sensors, the pH range and the stability of the potential were also tested, and then electrodes were used to determine the content of nitrate ions in water samples: tap water, mineral water and river water.
How to cite
K. Pietrzak, C. Wardak, 2022. The nitrate SCISEs based on cobalt(II) complex with 4,7-diphenyl-1,10-phenanthroline. In: 1st International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland: Environment – Plant – Animal – Product. https://doi.org/10.24326/ICDSUPL1/E010