Possibilities of employing a calculable four-electrode conductance cell to substitute the secondary standards of electrolytic conductivity

It seems that a four-electrode conductance cell designed and used according to the van der Pauw method can be applied for an absolute determination of electrolytic conductivity of solutions with an accuracy comparable with that of the secondary standards of this quantity. Therefore a possibility of avoiding the use of those standards in some cases can be expected. The results of experimental investigations of a prototype model of the cell of that type, carried out by the authors, are consistent with the theoretical considerations and results of computer modelling. An absolute determining of electrolyte conductivity has been made for 0.01 and 0.1 M KCl solutions, with overall uncertainty lower than 0.5%.