固相萃取-气相色谱-质谱联用法测定水中的硝基苯类有机污染物的分析方法研究

Determination of aromatic nitro-compounds in water by solid-phase extraction and gas chromatography/mass spectrometry

建立了固相萃取、毛细柱气相色谱-质谱、内标标准曲线法使用选择离子（SIM）监测采集数据定量分析水中硝基苯类有机化合物的分析方法。通过对固相萃取柱的选择、固相萃取条件（样品溶液的pH、上样速率、上样体积、洗脱液选择及配比）的优化，得出了最佳实验条件。始漏体积达1．5L。回收率大于80％。检出限为0．015～0．045μg/L。RSD在1．1％～5．9％之间。

A method for the determination of aromatic nitro-compounds in water by solid-phase extraction （SPE） and capillary gas chromatography/mass spectrometry was established. Water sample was subjected to SPE using C18 cartridge. The inspected conditions which include the pH value of water sample, load speed, load vohmle and elution solution were optimized. The maximal load volumes could be 1.5 L. The recoveries were between 80.0% and 105%. The relative standard deviations were in the range from 1.1% to 5.9%. The detection limits were between 0.015 μg/L and 0.045 μg/L.