Wyniki wyszukiwania dla: FLUOROBENZOIC ACIDS

• Sensitive simultaneous determination of 19 fluorobenzoic acids in saline waters by solid-phase extraction and liquid chromatography–tandem mass spectrometry

  Publikacja

  • P. Kubica
  • H. Garraud
  • J. Szpunar
  • R. Lobinski

  - JOURNAL OF CHROMATOGRAPHY A - Rok 2015

  A solid-phase extraction (SPE) procedure using C18 stationary phase was optimized for the preconcentration of 19 fluorinated derivatives of benzoic acid (FBA): mono-, di-, tri-, and tetrafluorosubstituted in the ring, trifluoromethylbenzoic acid and 3,5-bistrifluoromethyl benzoic acid from undiluted salt-rich (>20%) reservoir waters. Quantitative (>90%) retention/elution of 16 out of 19 analyte compounds was achieved allowing a...

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• Rapid ion-exchange matrix removal for a decrease of detection limits in the analysis of salt-rich reservoir waters for fluorobenzoic acids by liquid chromatography coupled with tandem mass spectrometry

  Publikacja

  • P. Kubica
  • V. Vacchina
  • T. Wasilewski
  • S. Reynaud
  • J. Szpunar
  • R. Lobinski

  - ANALYTICAL AND BIOANALYTICAL CHEMISTRY - Rok 2017

  A matrix removal procedure with ion-exchange resin prior to analysis for 18 fluorinated benzoic acids (FBAs) tracers in saline (>25% salt) reservoir water was optimized. The elimination of >98% of salt and the simultaneous matrix sample cleanup allowed the direct analysis using the supernatant by liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS). This resulted in a gain in detection limits for most of the tracers...

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