Solid-phase Microextraction Coupled with Gas Chromatography for the Analysis of 16 Polycyclic Aromatic Hydrocarbons in Drinking Water Sources

A rapid method for the determination of 16 polycyclic aromatic hydrocarbons (PAHs) in drinking water sources has been developed using solid-phase microextraction (SPME) coupled with gas chromatography (GC). SPME is a very efficient and simple, solventless sample preparation method which integrates sampling, extraction, concentration and sample introduction in a single step, considerably simplifying the sample preparation procedure. Extraction conditions for SPME such as the extraction time, agitation speed, extraction temperature, ionic strength and pH values were optimized. Under the optimized conditions, each water sample was stirred at 1 100 r·min-1 without addition of sodium chloride or pH adjustment, the extraction was carried out at 35 ℃ for 30 minutes using 100 μm polydimethylsiloxane (PDMS) fibers as the solid phase. The proposed method was applied for the analysis of 16 PAHs in Guiyang Hongfeng Lake as the drinking water source, the concentrations of 16 PAHs were determined with a relative standard deviation less than 16.36% and a recovery rate of 82.65%~115.35%.