Novel potentiometric sensors for joint definition of organic and inorganic electrolits in the water solutions based on their equilibrium sorption by ion-exchange

Abstract

Main principles of use of novel potentiometric sensors, which response is the Donnan potential,
are presented for joint determination of organic and inorganic electrolytes in multicomponent solutions.
Sensor systems are developed for the analysis of solutions of lysine monohydrochloride and tiamine
chloride with salts of alkaline and alkali-earth metals, and mixed solutions of pyridoxine hydrochloride
and nicotinic acid, and also solutions of neutral amino acids over the рН range 1,23-3,42. The
characteristics of the sensor array for the determination of tiamin, potassium and sodium were as follows:
the repeatability was ≤10%, the response time was 5-7 min