Automated method for the solid phase extraction of tetracyclines in wastewater followed by fluorimetric determination


  • Vargas-Muñoz M A
  • Boudenne Jean-Luc
  • Coulomb Bruno
  • Robert-Peillard Fabien
  • Palacio Edwin


  • Tetracyclines
  • Solid-phase extraction
  • Automation
  • Fluorimetry
  • Wastewater analysis

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This work presents a multisyringe flow injection analysis (MSFIA) system for the automatic extraction and determination of tetracyclines in wastewater samples. The sample was adjusted with Na 2 EDTA buffer before solid-phase extraction with an Oasis HLB column used for the analyte preconcentration. The europium (Eu 3+)based and citrate-mediated method (using Tris-HCl buffer) was selected for the fluorimetric analysis (λ exc/em = 400/612 nm). For fluorescence detection, a low-cost system consisting of an USB 2000 CCD detector and a 3Dprinted support that holds a LED light source was used. Under optimized conditions, the proposed method provided low limits of detection (9.4 μg L-1) and quantification (31 μg L-1), and good values for intra-day (<4 %) and inter-day precisions (<6 %). Recoveries of spiked TCs in wastewater samples ranged from 87 to 106 %. The results of this work were in good agreement with the measurements obtained by liquid chromatography coupled to a fluorescence detector.

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