Composition of the ion-selective electrode membrane for dodecylsulfate ions determination

摘要

The invention relates to the physico-chemical analysis methods, in particular, to the dodecylsulfate ions content determination in the solutions and industrial waters, as well the dodecylsulfate ion-selective electrodes production.The summary of the invention consists in the fact that the trinuclear chromium(III) benzoate dodecylsulfate is being used as an electroactive substance in the composition of the ion-selective electrode membrane for dodecylsulfate ions determination , comprising electroactive substance, the solvent-plasticizer and polyvinylchloride polymeric matrix, and as a solvent-plasticizer nitrobenzene and dioctylphthalate is used with the following components relation ( mas. %):nitrobenzeneabab 55dioctylphthalateabab 20...25polyvinylchlorideabab 20...25trinuclear chromium(III)benzoate dodecylsulfate(mole/kg of thesolvent-plasticizer)ab 10-2...10-3.The electroactive substance is stable, it is hardly washed out from the electrode membrane and provides suitable electrode caracteristics. As a result the service life and the sensitivity of the electrode are being increased.