Abstract
Ionic liquids were studied as the organic phase in the method of voltammetry between two immiscible electrolytes. The polarization of the interface between ionic liquid and water was studied; the dependence of the polarization range (potential window) on the solubility of ionic liquid in water was shown. It was established that the interface between H2O and ionic liquid based on hydrophobic substituted phosphonium cation and tris(pentafluoroethyl)-trifluorophosphate anion is polarized in the range of potential of about 500 mV, which creates the possibility of determining the concentration of some union, in particular perchlorate and nitrate, even in when they are both present, as well as to measure the solubility of more hydrophilic ionic liquids in water.
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