摘要
N, N, N′,N′-ethylenediaminetetrakis(methylenephosphonic acid), EDTPO, was synthesized and char-acterized by element analysis. The reaction of EDTPO with Cu(Ⅱ) formes a stable blue complex with a molarabsorptivity of 2. 88 × 10￣3 L· mol￣(-1)· cm￣(-1) at 285. 1nm. The composition of the complex is determined tobe 1: 1 . The concentration of Cu (Ⅱ)obeys the Beer′s law from 12. 7μg/ml to 50. 8 μg/ml .Co(Ⅱ), Mn(Ⅱ), Pb(Ⅱ), Cd(Ⅱ), Ca(Ⅱ), Mg (Ⅱ), Cr (Ⅱ) cause a negligible interference except forFe(Ⅱ), Zn(Ⅱ) in the determination of Cu (Ⅱ) with EDTPO. The spectrophotometric determinationof Cu(Ⅱ) is developed. This method is successfully used in determination of Cu(Ⅱ)in anolyte of electrolyticnickel.
N, N, N′,N′-ethylenediaminetetrakis(methylenephosphonic acid), EDTPO, was synthesized and char-acterized by element analysis. The reaction of EDTPO with Cu(Ⅱ) formes a stable blue complex with a molarabsorptivity of 2. 88 × 10￣3 L· mol￣(-1)· cm￣(-1) at 285. 1nm. The composition of the complex is determined tobe 1: 1 . The concentration of Cu (Ⅱ)obeys the Beer′s law from 12. 7μg/ml to 50. 8 μg/ml .Co(Ⅱ), Mn(Ⅱ), Pb(Ⅱ), Cd(Ⅱ), Ca(Ⅱ), Mg (Ⅱ), Cr (Ⅱ) cause a negligible interference except forFe(Ⅱ), Zn(Ⅱ) in the determination of Cu (Ⅱ) with EDTPO. The spectrophotometric determinationof Cu(Ⅱ) is developed. This method is successfully used in determination of Cu(Ⅱ)in anolyte of electrolyticnickel.
