Determination of 16 kinds of polycyclic aromatic hydrocarbons in surface water by headspace solid-phase microextraction and gas chromatography-mass spectrometry
Objective A fully automatic headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry was developed for the determination of 16 kinds of polycyclic aromatic hydrocarbons(PAHs)in surface water.Methods The fully automatic headspace solid-phase microextraction technology was used to enrich PAHs in surface water,the extraction conditions were as follows:extraction temperature 60 ℃,extraction time 40 min and oscillation speed 500 r/min.Gas chromatography-mass spectrometry was used for performing qualitative and quantitative analysis.Results Under the optimized condition,good linearity was achieved under the mass concentration ranging 0-10.0 μg/L,and the correlation coefficients(r)were in the range of 0.9,764-0.9,990.The recoveries were 75.9％-108％,and the relative standard deviation(RSD)was less than 6.0％.The method was applied to the determination of surface water samples collected from urban areas,and no polycyclic aromatic hydrocarbons were detected.Conclusion The method is sensitive,accurate and simple,and does not require organic solvents in the extraction process.It can meet the requirement for detecting 16 kinds of PAHs in surface water.
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