地表水中半挥发性有机物的固相萃取GC-MS方法研究

Detection of SVOC in Surface Water with GC /MS Using Solid-Phase Extraction

利用膜式固相萃取与气相色谱-质谱联用,尽可能多的涵盖了GB 3838—2002饮用地表水80项分析中各种不同性质的半挥发性有机物,建立了地表水中半挥发性有机物的检测方法。优化的固相萃取条件:选用8270专用盘,在中性条件(pH 6～7)下,二氯甲烷淋洗2次,丙酮淋洗1次。方法检出限为0.02～0.17μg/L,各物质回收率均在EPA8270方法中所推荐的回收率范围内。

A GC /MS method was developed for the determination of SVOC in surface water with solid-phase extraction（SPE）.The optimal condition with SPE was obtained as follows： Bakerbond speedish for EPA Method 8270 was selected as extractive membrane,the optimal pH of extraction was 6 ～ 7,eluted by CH2 Cl2 twice first,then eluted by acetone.The limits of method ranged from 0.02 to 0.17μg /L,and recoveries were accord with EPA 8270.