Determination of sodium alkyl sulfonate by NMR method

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Other Title
  • スルホン基を含む界面活性剤の組成分析に対するＮＭＲシフト試薬の利用　Ｉ　　ＮＭＲスペクトル法によるアルキルスルホン酸ナトリウムの分析
  • NMR スペクトルホウ ニヨル アルキルスルホンサン ナトリウム ノ ブンセキ
  • NMRスペクトル法によるアルキルスルホン酸ナトリウムの分析
  • スルホン基を含む界面活性剤の組成分析に対するNMRシフト試薬の利用(I)

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Description

The sodium alkyl sulfonates (PS) prepared from paraffin by sulfoxidation reaction are used as effective anionic detergents. The products are mixture of secondary sulfonate isomers. The analysis of each isomer is important for the elucidation of reaction mechanism of sulfoxidation and their physical properties. The authors carried out the isomer analysis of PS by means of NMR method with the NMR shift reagent, Eu (dpm)3.<BR>In the ordinary NMR spectrum of methyl alkyl sulfonate, the information on the position of sulfonicgroup could not be obtained. It was found that methyl signals of ester group shift toward lower fields by addition of a suitable amount of shift reagent. The difference in magnitude of the induced chemical shift was clearly related to the positions of sulfonic groups. The order of induced chemical shift of the methyl signal was 1, 2, 3, 4, 5, 6 and 7-9 methylsulfonate, respectively.<BR>Sulfonate isomers in PS can be determined by using the area of the peak of methyl signal of ester group for each isomer.<BR>The standard deviation in the quantitative analysis were from 0.94 to 1.15. This method was applied to the analysis of PS with carbon chain distribution and to the analysis of sodium alkyl di-sulfonate.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 26 (1), 5-9, 1977

    The Japan Society for Analytical Chemistry

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