FIELD: chemistry.
SUBSTANCE: membrane of the lead-selective electrode includes the following compounds with a certain component ratio, wt %: polyvinyl chloride (PVC) - 31.89; dioctyl sebacate (DOC) - 63.81; diantipyrylmethane (DAM) - 2.50, and oleic acid (OC) -1.80. A method for producing this membrane is also proposed, in which diantipyrylmethane, which includes ligands containing nitrogen atoms, forms a complex with the lead ions (with an average stability of = 3.21), and the interfering ions of heavy metals are bound to more stable ammonia complexes.
EFFECT: expanding the linear region of electrode functioning, decreasing the response time and increasing the sensitivity of the determining the lead ions, and significant chemical stability of the film membrane in various reaction media.
2 cl, 2 dwg, 2 tbl
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