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9423163 
Journal Article 
DEVELOPMENT OF A POTENTIOMETRIC SENSOR SENSITIVE TO ETHONIUM 
Volnyanska, OV; Mironyak, ÐÐ; Labyak, ÐV; Nikolenko, ÐV; Kovalenko, VL; Kotok, VA 
2020 
Asian Research Publishing Network 
15 
19 
2182-2187 
English 
The article reports about the development of a potentiometric sensor sensitive to ethonium. An ionic associate based on an organic cation of ethonium with 12-molybdophosphoric acid is determined to be used to synthes of potentiometric sensor polyvinyl chloride film membranes. The obtained ionic associate (Et)3(PMo12O40)2 meets the basic requirement for an electrode-active substance (poor solubility in water and good solubility in organic solvents). Phthalic acid derivatives (dibutyl phthalate and dioctyl phthalate) were used as solvent-plasticizers for the polyvinyl chloride membrane. The optimal composition of the membranes was established. The influence of various factors on its electrode characteristics was investigated with the developed potentiometric sensor. The optimal conditions for using the developed potentiometric sensor were found. The working pH range for the sensor is 4.0. The linearity interval of the electrode function is 1·10–5–1·10–2 mol/l, the slope is 28.0 mV/pC, and the minimum detectable concentration is 10–5 mol/l. The sensor response time does not exceed 3 minutes, and the membrane life (~ 50 days) allows determination without changing. The developed potentiometric sensor sensitive to ethonium can be used in various objects of research at the concentration range of 10–4–10–5 mol/l in a short period of time (5-10 min). © 2020. Asian Research Publishing Network (ARPN). All Rights Reserved. 
12-molybdophosphoric acid; ethonium; ionic associate; polyvinyl chloride membranes; potentiometric determination; potentiometric sensors