High-speed liquid chromatography of degradation products of sodium dodecylbenzenesulfonate by gamma rays irradiation

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  • ドデシルベンゼンスルホン酸ナトリウムの放射線分解生成物の高速液体クロマトグラフィー
  • ドデシルベンゼンスルホンサン ナトリウム ノ ホウシャセン ブンカイ セイセイ

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Description

Gamma rays irradiation-induced degradation of sodium alkylbenzenesulfonate has been mainly studied. on its removal by using methylene blue method. However, the degradation processes have been little revealed because of the difficulty of analysis of the degradation products. In this study, the isolation condition of sodium dodecylbenzenesulfonate (DBS) and its degradation products by gamma rays irradiation was studied by high-speed liquid chromatography (HLC). These compounds could be isolated under the following condition; Column: Permaphase ETH (Du Pont), Column pressure: 30 kg/cm2, Mobile phase: Linear gradient from 0.01 M H2SO4-iso-propanol/n-hexane (1/99) to 0.01 M H2SO4-iso-propanol at 2%/min, Column temperature: 50°C, Detector : UV spectrophotometer (220 nm). The degradation products which were isolated and collected by HLC were identified by using gaschromato-massspectrometer, infrared and ultraviolet spectrophotometers. Dimer, alkylphenol, hydroxyphenyl alkanoic acid, sulfophenyl alkanoic acid, hydroxysulfophenyl alkanoic acid and ring-cleavage product were detected as the degradation products in oxygenated aqueous solution of DBS. The degradation rate of DBS is recognized as first-order reaction and thep rimary products described above begin to be secondarily degradated at the stage of the consumption above 50% of DBS. Finally, DBS is degradated to carbon dioxide.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 26 (11), 780-785, 1977

    The Japan Society for Analytical Chemistry

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