Quantitative determination of a mixture of J-acid and γ-acid, and a mixture of amino-J-acid and amino-G-acid by the KBr tablet method

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  • TANAKA Shigeyuki
    Institute of Techno-Analytical Chemistry, Faculty of Engineering, University of Tokyo
  • OGAWA Masayuki
    Department of Industrial Chemistry, Faculty of Engineering, Chuo University

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Other Title
  • KBr錠剤法によるJ酸およびγ酸混合物ならびにアミノJ酸およびアミノG酸混合物の定量
  • セキガイセン キュウシュウ スペクトル ニ ヨル テイリョウ ブンセキ 7
  • Quantitative analysis by use of infrared spectra. VII
  • 赤外線吸収スペクトルによる定量分析(第7報)

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Description

A tablet machine for the potassium bromide tablet method has been made, and quantitative determinations by infrared absorption spectroscopy have been carried out on a solid mixture composed of J-acid [2, 5, 7-H2N(HO)C10H5SO3H] and γ-acid [2, 8, 6-H2N(HO)C10H5SO3H], and a solid mixture of amino-J-acid [2, 5, 7-H2NC10-H5(SO3H)2]and amino-G-acid [2, 6, 8-H2-NC10H5(SO3H)2]in potassium bromide tablets. These mixtures can not be determined by the solution method, but by this tablet method satisfactory results have been obtained. The results of estimation of standard mixed samples of isomers composed of J-and γ-acids indicated that the standard deviation of them was 1.7 %, and that of standard mixed samples of amino-J-acid and amino-G-acid was 1.4 %.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 6 (5), 285-290, 1957

    The Japan Society for Analytical Chemistry

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