水溶性ポルフィリンを用いる超微量金属の抽出吸光光度定量 : 銅の定量

概要

論文の詳細を見る
It has been found that the water-soluble porphyrins such as α, β, γ, σ-tetrakis (4-sulfophenyl) porphine[T (4-SP)P] or α, β, γ, σ-tetrakis(l-methylpyridinium-3-yl) porphine [T (3-MPy)P] and their metal complexes can be extracted quantitatively into organic solvent in the presence of suitable counter ions, and that only the complexes can be extracted selectively under a suitable condition. On the basis of this finding, highly sensitive extraction-spectrophotometric methods for the determination of ultramicro amounts of copper, zinc, lead, cobalt, manganese and palladium have been developed. As an example, two determination methods for copper are described here. In one of them, a copper(II)-T(4-SP)P complex is extracted into benzene in the presence of trioctylmethyl-ammonium chloride (Capriquat), and in another, a copper(II)-T(3-MPy)P complex is extracted into 2-nitropropane in the presence of perchlorate ions. In either method, a straight-line calibration curve was obtained. The sensitivity for 0.001 absorbance was 0.13_8ng Cu/cm^2 in the T(4-SP)P method and 0.15_8 ng Cu/cm^2 in the T(3-MPy)P method.
社団法人日本分析化学会の論文
1980-04-05