POTENTIOMETRIC DETERMINATION OF DISSOCIATION-CONSTANTS FOR SODIUM-SALT OF MORIN-5'-SULFONIC ACID (NAMSA) AND STABILITY-CONSTANTS FOR COMPLEXES CO(II), NI(II) AND CU(II) WITH NAMSA

The potentiometric method was used to determine the dissociation constants for sodium salt of morin-5-sulfonic acid and the stability constants for its complexes with Co(II), Ni(II) and Cu(II). Investigations were carried out in aqueous solutions at a constant ionic strength mu = 0.1 (NaClO4), at 293 K.