Determination of Nonylphenol and Octylphenol in Seawater Samples Using Solid-Phase Microextraction Procedures Coupled to Gas Chromatography–Mass Spectrometry

The solid-phase microextraction (SPME) technique with on-fiber derivatization coupled to gas chromatography–mass spectrometry was evaluated for the analysis of technical nonylphenol (NP) and octylphenol (OP). The optimization of operating conditions influencing the performances of SPME and derivatization were studied in detail. The optimised method was linear over the range studied and showed good level of precision, with a RSD lower than 10% and detection limits at and 0.003 μgL−1for OP and 0.032μgL−1for NP, respectively. The results obtained from different seawater samples revealed the presence of the target compounds, at levels ranging between 0.034 and 0.186 μgL−1.