Today, due to the rapid development of the chemical and pharmaceutical industry in the world and the growth of all branches of pharmaceutical production, the need for accurate and simple methods for the analysis of drug potency is increasing year by year. Therefore, special attention is paid to the development of rapid, simple and economically viable methods suitable for screening drug compounds. Ion-selective electrodes with plasticized membranes are a solution to this problem. Such electrodes are easy to manufacture, easy to manufacture and have a wide concentration range of the device....