溶媒浮選/吸光光度法を用いる陰イオン界面活性剤の濃縮と定量(<特集>超微量分析のための前処理と予備濃縮)

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書誌事項

タイトル別名
  • Solvent sublation/spectrophotometric determination of traces of anionic surfactants.
  • 溶媒浮選／吸光光度法を用いる陰イオン界面活性剤の濃縮と定量
  • ヨウバイ フセン キュウコウ コウドホウ オ モチイル インイオン カイメン

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抄録

A method for the determination of anionic surfactants, mainly dodecylsulfate was established. It is based on the flotation of ion pair, formed by the surfactants and Ethyl Violet, into solvent layer and successive spectrophotometric determination: Two hundred milliliters of sample was adjusted to pH 4.7 using acetate buffer and poured into a foam separation tube (33 mm i.d. × 360 mm, Pyrex glass). Then, it was added with 5 ml of toluene-methyl isobutyl ketone (9:1) mixture, while nitrogen was fed at very low flow rate through the sintered glass plate (No. 3). After 0.5 ml of 0.1% Ethyl Violet aqueous solution was injected by a syringe through the side septum, nitrogen flow rate was adjusted at 8.6 ml min-1and the solution was flotated for ten, min. Then the organic layer was removed and measured of its absorbance at 608 nm. The lower limit of determination was estimated to be 5 μg 1-1. The method has no difficulty in the phase separation and was applied successfully to the determination of total alkylsulfate contents in several water samples.

収録刊行物

  • 分析化学

    分析化学 36 (11), 740-744, 1987

    公益社団法人 日本分析化学会

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