Abstrakt:
An extraction of "-tocopherol from different water-ethanolic mixtures into a
commonly used paste binder was studied by ultraviolet spectrometry and anodic
square wave voltammetry. It has been observed that distribution of the
"-tocopherol between two immiscible phases is controlled by equilibrium constant
that is significantly affected by the amount of organic solvent present in the
aqueous phase. Moreover, it is evident that extraction of some biologically active
compounds into the carbon paste could be used as the accumulation step within
the extractive stripping voltammetric procedure to improve the sensitivity of their
appropriate electroanalytical determination.