4-(2-ピリジルアゾ)レソルシノール錯体の逆相イオン対分配クロマトグラフィーとその鉄,コバルト及びニッケルの吸光光度定量への応用

概要

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A novel method for the separation of metal ions by reverse phase ion-pair partition chromatography is developed based on the ion-pair formation of anionic metal-4-(2-pyridylazo)resorcinolato (PAR, H_2L) complexes with quaternary ammonium cation. The quantitative separation of cobalt(III)-, iron(III)-, and nickel(II)-PAR complexes was accomplished within 20 min on a 3.9mm×300mm μ-Bondapak C_<18> column (Waters Associates), where 56.2%(v/v) methanol-water mixture containing 0.014mol dm^<-3> of tetrabutylammonium bromide was used as a mobile phase now rate of 0.91cm^3 min^<-1>. These metal ions 10^<-6>〜10^<-5>)mol dm^<-3> level can be determined with the peak height calibration curves obtained at 254nm using 0.04 absorbance unit full-scale. The order of the peak positions of the singly charged anions such as[CoL_2]-, [FeL_2]-, and HL- were well correlated to that of their ion-pair extraction constants.
社団法人日本分析化学会の論文
1978-05-05