Исследование влияния структуры высшей четвертичной аммониевой соли на селективность тетрафтороборатного электрода

Abstract

The research of length influence of hydrocarbonic substitutes at quaternary ammonium salt (QAS) nitrogen atom to analytical characteristics of tetraftoroborate electrodes has been carried out. The functions of electrodes have gradients similar to theoretical. The detection limits change from 5,0·10–6 to 1,3·10–6 mol/l. The values of potentiometric selectivity coefficients decrease with increasing length of the hydrocarbonic substitutes at QAS nitrogen atom. The reason is the correlation of the constant of main and interfering anions assosiation with ion-exchanging QAS centres determines the one-charged ions potentiometric selectivity coefficients.