| 摘要 |
FIELD: potentiometric methods of analysis and check of concentration of ions in aqueous solutions, can be used in chemical, metallurgical industries, optical chemistry and in practice of scientific researches. SUBSTANCE: in the membrane of ion-selective electrode for determining the activity of perrhenate-ions, containing an electrode-active substance on the basis of an ion associate of perrhenate-ions with organic cation immobilized in a polymeric matrix on the basis of polyvinyl chloride and organic plasticizer, ion associate of perrhenate-ions with cations of tetrazolium is used as the electrode-active substance, and O-nitrophenyloctyl ether is used as plasticizer at the following relation of membrane components (percent by weight): Electrode-active substance 3.1 to 6.2 Polyvinyl chloride 35.9 to 37.5 O-nitrophenyloctyl ether 57.8 to 59.4. EFFECT: expanded range of determination of activity of perrhenate-ions towards the lower limit of detection, enhanced mechanical strength of electrode membrane. |
