エチレングリコールビス(2-アミノエチルエーテル)-N,N,N',N'-四酢酸-鉛(II)錯体の金属置換反応による銅(II)の吸光光度定量

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A method for the determination of copper (II) was studied by the substitution of the lead (II) complexes of ethyleneglycolbis (2-aminoethylether) -N,N,N',N'-tetraacetic acid(GEDTA) for copper(II). Each 5 ml of 1 M sodium perchlorate and 1.0×10^<-3> M lead(II)-GEDTA was taken into a 50 ml measuring flask, added 25 m] of a sample solution containing (0.2〜6.4)μg/ml of copper (II), adjusted the pH of the mixed solution to 1.8, and diluted to 50 ml with water. The absorbance was measured at 260 nm after 2 min. Both linear calibration curves were obtained in the range of (0.1〜3.2)μg/ml of copper(II), and (0.1〜6.4)μg/ml of copper (II) respectively, when 1.0×10^<-4> M Pb-GEDTA, and 5.0×10^<-4> M Pb-GEDTA were substituted for each other. The following amounts (μg/ml) of diverse ions were allowed for the determination of l.27 μg/ml of copper (II) : Ca (II) 56, Mg(II) 49. Ba (II) 137, Co(II) 59, Mn(II) 77, Ni(II) 59. Zn(II) 131, Cd-(II) 90, Be(II) 5, Zr(IV) 46, Pb(II) 62, Hg(II) 4, Al(III) 5, Ga(III) 2, In(III) 2, Cl- 106, SO_4^<2-> 192, NO_3- 37μg/ml. Even though either iron (III) or bismuth(III) was presented up to 0.1μg/ml, they interfered respectively.
社団法人日本分析化学会の論文
1980-01-05