Abstract
Indirect complexometric determination of 0.4–4 mg of A1 in 0.2 M solutions of NaNO3, NH4NO3 and 0.01 M Mg(NO3)2 or 0,01 M Ca(NO3)2 was studied. The solid membrane cupric-ion selective electrode was used for end-point detection in back‐titration of DCTA (added in excess) with a cupric standard solution.