Nonlinear determination of complexing constants in aqueous solutions by the least square method

A program for nonlinear determination of complexing constants by the least square method from the data of pH-metric titration was compiled. To minimize the target function, the deformed polyhedron method Was used, whose choice is due to the fact that it has a number of advantages over the methods requiring calculation of partial derivatives. The program compiled was used for simulating equilibria and estimating their constants in the NaCl3 system hydrazinediacetic acid