Abstract
3, 3'-Bipyridazine derivatives containing the ferroin group react with iron (II) in a weakly acidic medium to form highly colored red complexes. The spectrophotometric determination method for iron (II), based on this reaction, is moderately selective, the sensitivity being 1.8-2.8×10-3μg Fe (II)/cm2 for log I0/I=0.001 at 520 mμ. The optimum concentration range is 0.5-2.5×10-7 moles of Fe (II)/ml. The complexes are stable at room temperature for 24 hr and contain Fe (II) and the reagents at the ratio of 1 : 3. 3, 3'-Bipyridazine derivatives tested in this examination proved to be superior to 2, 2'-bipyridine.
