Theory of errors of the radioanalytical method of sub-super equivalence using a simple solvent extraction system

The theory is given of errors of the title method based on the solvent extraction reaction A_aq+B_aq⇌AB_org, the minimum amounts which can be determined are assessed, the desirable values of ξ are recommended and the precision of the title method is compared with that of the concentration dependent distribution method. Tables are given allowing a rapid calculation of the error of determination for any reasonable concentration of the substance to be determined, any extractant concentration and a chosen value of ξ if the equilibrium constant of the above reaction is known.