MEMBRANE OF A SOLID-CONTACT ION-SELECTIVE ELECTRODE USED FOR DETERMINING CONCENTRATION OF MIRAMISTINE

摘要

The proposed membrane of a solid-contact ion-selective electrode used for determining concentration of miramistine contains active substance and stabilizer of the solid contact potential. As the active substance, compound of miramistine with phosphomolybdic acid is used. As the stabilizer of the solid contact potential, preparation of colloidal silver (colargol) is used. The contents, in percent by weight, of the material components are as follows: Polyvinylchloride 30.5 ... 42.5 % Dioctylphthalate 55 ... 65 % Compound of miramistine with phosphomolybdic acid 1.0 ... 2.2 Colargol 1.5 ... 3.0 The proposed material is distinctive by its enhanced sensitivity and selectivity to miramistine at the change of miramistine concentration in a wide range and at the presence of foreign substances.