【摘要】 采用固相微萃取(SPME)与气相色谱联用方法,准确、快速地分析了饮用水源水中16种多环芳烃(PAHs)。对SPME的萃取条件进行了优化,选用100μmPDMS萃取涂层,在搅拌速度为1100r·min-1、温度为35℃下萃取30min,不调节萃取体系的pH值、不需向样品溶液中加入盐。整个分析方法将采样、萃取、进样、分析融于一身,具有易于操作、高效且精确等特点。应用本方法对贵阳市红枫湖饮用水源水中的16种PAHs进行了测定,方法的相对标准偏差小于16.36%,回收率为82.65%～115.35%。更多还原

【Abstract】 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%.更多还原