Abstract：The gas was collected with the special sampling bottle. Then, the content of naphthalene in gas was determined by gas chromatography(GC) after pretreatment with solid phase microextraction (SPME) technology. The optimal extraction conditions of SPME were obtained by experiments: the 100 μm polydimethylsiloxane(PDMS) was used as extraction coating; the extraction time at rotate speed of 800 r/min was 5 min at room temperature; the desorption time of gas chromatography was 3 min. The baseline was smooth and steady in presence of acetone solvent peak. The determination of naphthalene was not affected by the acetone peak. The results showed that the content of naphthalene exhibited good linearity in range of 5-200 mg/m3 with correlation coefficient of 0.999 9. The detection limit of method was 0.08 mg/m3. The proposed method was applied to determination of naphthalene in gas. The relative standard deviation (RSD, n=7) was 2.6%-4.9%, and the recoveries were between 85% and 108%.
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