Ceskoslovenska Akademie Ved

Miloslav Semler

Miroslav Panoch

Miloslav Kolinsky

Olen Ryba

Jaroslav Petranek

Bretislav Manek

Membrane for barium ion selective electrode The solution pertains to a membrane for barium ion selective electrode formed by the film of suitable polymeric material, for example, high-molecular weight poly(vinyl chloride), with an ion exchanger based on a neutral carrier, namely N,N'-diphenyl-N,N'-di-(2-n-butyloxycarbonylphenyl)diamide of 3,6,9-trioxaundecandioic acid ##STR1##

Membrane for barium ion selective electrode

Polymeric membrane selective to calcium (II) ions. The invention relates to a polymeric membrane selective to calcium (II) ions, formed by a solid film of plastic material, advantageously of poly(vinyl chloride), which contains an active neutral carrier in a plasticizer of the used plastic material. The active carrier is a complex of macrocyclic polyetherdiamides of the general formula ##STR1## where R.sub.1, R.sub.2, R.sub.3, R.sub.4 are H or alkyl containing 1 to 4 carbon atoms, advantageously methyl, R.sub.5 and R.sub.6 mean alkyl or arylalkyl with 6 to 10 carbon atoms, advantageously benzyl, with the calcium (II) ions and a lipophilic organic anion, advantageously with tetraphenylborate or tetra(p-chlorophenyl)borate anion.

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Prepere, Czechoslovakia

Miloslav Semler