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      Purification of Ethoxyquin and Its Two Oxidation Products

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      Journal of Agricultural and Food Chemistry

      American Chemical Society (ACS)

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          Abstract

          2,6-Dihydro-2,2,4-trimethyl-6-quinolone (QI) and 1,8'-bis(1, 2-dihydro-6-ethoxy-2,2,4-trimethylquinoline) (DM) are two oxidation products of 1,2-dihydro-6-ethoxy-2,2,4-trimethylquinoline (ethoxyquin, EQ). This paper describes several methods for the purification of technical grade EQ and for the production of pure QI and DM as standards with the purity required (>99%) for calibration of quantitative determination methods. EQ of high purity was obtained through vacuum distillation followed by a quick column chromatographic purification on silica gel. Preparative scale purity DM could be obtained through recrystallization from methanol, but QI could be purified only by a high-pressure liquid chromatographic method.

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          Author and article information

          Journal
          Journal of Agricultural and Food Chemistry
          J. Agric. Food Chem.
          American Chemical Society (ACS)
          0021-8561
          1520-5118
          August 2000
          August 2000
          : 48
          : 8
          : 3069-3071
          Article
          10956069
          © 2000
          Product

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