Using high porosity propylene hollow fibers,δ-Al2O3-SiO2 adsorbent was deposited on the surface of the hollow fibers by sol-gel technique to prepare δ-Al2O3-SiO2-HF solid-phase microextraction fiber.Establish a hollow fiber-solid-phase microextraction-high-performance gas chromatography(SPME-GC)method for quantitative analysis of benzene series compounds in surface water.After optimizing the pre-treatment conditions,the optimal extraction temperature of 55 ℃ and time of 20 minutes were obtained,and eight benzene series compounds were found to be in the range of 0.1-50.0 μ g/L the linearity is good within the concentration(R2＞0.993),the detection limit of the method is 0.144-2.253 ng/L,the relative standard deviation(RSD)is 2.53％-9.62％,and the recovery is 90.1％-108.9％.Through actual sample application,this method is easy to operate,has high sensitivity,and can meet the analysis requirements with precision and accuracy.It has certain promotion and application value.
关键词
固相微萃取/中空纤维/高效气相色谱/苯系物/地表水
Key words
solid phase microextraction/hollow fiber/high performance gas chromatography/benzene derivatives/surface water
维普
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