β-メルカプトヒドロ桂皮酸, β-メルカプト桂皮酸のニッケル, コバルトの比色定量試薬としての応用

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書誌事項

タイトル別名
  • Application of β-mercaptohydrocinnamic acid and β-mercaptocinnamic acid as reagents for spectrophotometric determination of nickel and cobalt
  • ベータ-メルカプトヒドロ ケイヒサン , ベータ-メルカプト ケイヒサン ノ ニッケル , コバルト ノ ヒショク テイリョウ シヤク ト シテ ノ オウヨウ
  • Studies on the sulfur-containing chelating agents. XVI
  • イオウを含むキレート試薬に関する研究 (第16報)

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説明

The complex formations of β-mercaptohydrocinnamic acid and β-mercaptocinnamic acid with nickel and cobalt ions were studied, and their applicabilities as new reagents for the spectrophotometric determination of nickel and cobalt ions were investigated.<BR>β-Mercaptohydrocinnamic acid formed Water-soluble complexes with nickel and cobalt ions in alkaline medium. The absorption maxima were observed at 520 mμ in the nickel complex and 560 mμ in the cobalt complex. The applicability of Beer's law was confirmed at the wavelengths of the absorption maxima of the complexes when the concentration of the metal ion was less than 100 ppm. β-Mercaptocinnamic acid formed also water-soluble complexes with nickel and cobalt ions in alkaline medium. The absorption maxima were observed at 495 mμ in the nickel complex and 635 mμ in the cobalt complex. Simultaneous determination of nickel and cobalt ions in their mixture was possible by the measurement of the absorbance at 495 mμ and 635 mμ. The molar ratios of the metal ions to the ligand in solution were found to be 1 : 2 and 1 : 3 in the nickel complex and cobalt complex, respectively, by mole ratio method and continuous variation method. As these reagents were very stable, they were considered to be useful as the analytical reagents.

収録刊行物

  • 分析化学

    分析化学 17 (2), 129-134, 1968

    公益社団法人 日本分析化学会

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