Extraction and analysis of various benzothiazoles from industrial wastewater

Oliver Fiehn, Thorsten Reemtsma, Martin Jekel

Research output: Contribution to journalArticlepeer-review

61 Scopus citations


A method was developed for the analysis of benzothiazole, 2-mercaptobenzothiazole, 2-(methylthio)benzothiazole and 2-(thiocyanomethylthio)benzothiazole from industrial wastewater. It includes liquid-liquid extraction with ethyl acetate and toluene at pH 8.5, followed by liquid chromatographic (LC) analysis using a RP-18 column and an acetonitrile-water gradient with UV detection at variable wavelengths. LC analysis is compared with the potential of gas chromatography and its advantages are discussed. Solid-phase extraction appeared not to be a suitable for all compounds. The method allows the determination of benzothiazole derivatives without further clean-up down to contents of about 5 μg l-1, with recovery rates exceeding 90% for all compounds. Dissolved organic carbon contents of up to 900 mg l-1 did neither interfere with extraction nor with chromatographic separation.

Original languageEnglish (US)
Pages (from-to)297-305
Number of pages9
JournalAnalytica Chimica Acta
Issue number3
StatePublished - Sep 20 1994
Externally publishedYes


  • Benzothiazoles
  • Extraction
  • Liquid chromatography
  • Wastewater
  • Water

ASJC Scopus subject areas

  • Biochemistry
  • Analytical Chemistry
  • Spectroscopy
  • Environmental Chemistry


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