MEMBRANE OF AN ION-SELECTIVE ELECTRODE FOR THE DETERMINATION OF AN OCTAHYDROTRIBORATE ANION Russian patent published in 2017 - IPC G01N27/333 

FIELD: chemistry.

SUBSTANCE: invention relates to potentiometric methods for the quantitative determination of substances (ionometry) and can be used for nondestructive testing and automatic control of the content of octahydrotriborate anion in aqueous, including technological, solutions. A membrane of an ion-selective electrode for the determination of an octahydrotriborate anion containing polyvinyl chloride, 2-nitrophenyloctyl ether as a plasticiser and an electrocoactive component based on tetraalkylammonium octahydrotriborate is proposed, with the composition comprising a mixture of tetraalkylammonium octahydrotrithi borate having a carbon number in the alkyl radical of 8 to 12 with a hydrophobic addition of tetradecylammonium tetraphenylborate at certain proportions of the component Nents: polyvinyl chloride, 2-nitrophenyloctyl ester tetraalkyl ammonium octahydrotriborate, tetradecylammonium tetraphenylborate.

EFFECT: invention makes it possible to optimize the composition of the electrode membrane to determine the octahydrotriborate anion, which improves electroanalytical characteristics such as detection limit, angular slope, reproducibility and stability of the potential.

2 tbl, 1 dwg