固相抽出法を用いる環境水中のチオ硫酸イオンと亜硫酸イオンの現場前濃縮/吸光光度定量法

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タイトル別名
  • Roles of Interfacial Functions in Analytical Chemistry. In situ preconcentration method for thiosulfate and sulfite in environmental water samples using solid-phase extraction followed by a spectrophotometric determination.
  • 界面機能と分析化学　　固相抽出法を用いる環境水中のチオ硫酸イオンと亜硫酸イオンの現場前濃縮／吸光光度定量法
  • コソウ チュウシュツホウ オ モチイル カンキョウ スイチュウ ノ チオ リュ

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A simple and rapid method for simultaneous in situ preconcentration of thiosulfate and sulfite in environmental waters samples has been developed based on solid-phase extraction using a couple of Sep-Pak C18 cartridges (SP-1 and SP-2). The first Sep-Pak C18 cartridge (SP-1) was treated with methanol and the second one (SP-2) with a tetrabutylammonium hydrogen sulfate solution (TBAHS) before use. A water sample was taken into a graduated syringe to prevent oxidation of thiosulfate and sulfite by air, and to form DTMP derivatives of thiosulfate and sulfite, 2, 2'-dithio bis(5-nitro pyridine) (DTNP) was added. The mixture was passed through the connected SP-1 ·SP-2 cartridge, in which DTNP derivatives of thiosulfate and sulfite were retained on the SP-1 and the SP-2, respectively. The DTNP derivative of thiosulfate was eluted with 20% methanol, followed by measuring the absorbance of the eluate at 320 nm. The DTNP derivative of sulfite was eluted with a mixture of 40% methanol and TBAHS, and the absorbance was measured at 320 nm. The proposed method is applicable to brackish and sea water samples as well as freshwater samples.

収録刊行物

  • 分析化学

    分析化学 47 (12), 985-991, 1998

    公益社団法人 日本分析化学会

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