COMPOSITION OF THE MEMBRANE OF THE ION-SELECTIVE ELECTRODE FOR THE DETERMINATION OF LEAD IONS

摘要

FIELD: ionometry.;SUBSTANCE: invention relates to ionometry, in particular to the development of compositions of membranes with ionic conductivity for ion-selective electrodes, selective to lead ions. The composition of the membrane of the ion-selective electrode for the determination of lead ions includes polyvinyl chloride as a polymer matrix, dibutyl phthalate as a plasticizer, a lipophilic additive and an electroactive component, while tetrakis(4-fluorophenyl)sodium borate dihydrate is used as a lipophilic additive, and 1-(methoxydiphenylphosphoryl)-2-diphenylphosphorylbenzene, with the following ratios of membrane components, wt.%: polyvinyl chloride 26-33, dibutyl phthalate 65-70, sodium tetrakis (4-fluorophenyl) borate dihydrate 0.5-1.5, 1-(methoxydiphenylphosphoryl)-2-diphenylphosphorylbenzene 1-3.;EFFECT: obtaining a lead-selective membrane.;1 cl, 3 tbl