SIMULTANEOUS DETERMINATION OF 16 FLUOROBENZOIC ACIDS (FBA) IN PRODUCED WATER SAMPLES BY SOLID-PHASE EXTRACTION AND GAS CHROMATOGRAPHY- MASS SPECTROMETRY

Abstract

A method for the simultaneous analysis of 16 fluorobenzoic acids (FBA) via GC–MS based on solidphase extraction (SPE) and derivatization with pentafluorobenzyl bromide is described. The method
may be applicable to tap water, sea water and produced water samples with high salinity (300g/L). It
uses low amounts of chemicals and is adaptable from 100 to 500mL of sample volumes. Solid-phase
extraction on polymeric Strata X cartridges allowed the enrichment of the acids with extraction
recovery between 70% and 110%. The method detection limit was 0.2-1.0 µg/L and the relative
standard deviations were less than 15% in the concentration range 1.6–10 µg/L.