摘要
建立了固相萃取-气相色谱质谱联用同时测定海水中的甲基对硫磷、马拉硫磷和对硫磷的方法。采用C18小柱固相萃取富集水样、CH2CI2洗脱,加入菲-d10作为内标,利用GC/MS定性定量同时测定了海水中的甲基对硫磷、马拉硫磷和对硫磷,线性响应良好,干扰小,最低检出限为0.20 ng/L(按采样2 L计算),通过对海水样品的标准添加,平均加标回收率范围在96.0%～122%(n=6),RSD在2.3%～6.8%。表明本方法可以满足海水中甲基对硫磷、马拉硫磷和对硫磷的检测。同时,利用该方法对广西近岸海域7个点位采集海水样品进行检测,检测结果全部为未检出。
A method was established for methyl parathion,malathion and parathion in seawater by GC/MS with solid-phase extraction.Methyl parathion,malathion and parathion were extracted from seawater with octadecylsilica（C18） SPE cartridge,eluted with the methylene chloride,detected by selected ion monitoring mode and phenanthrene-d10 as internal standard.The good linear responses were achieved and little inference.The detection limit was 0.20ng/L when the sample volume was 2L and average recoveries 96.0%～122%（n=6）,RSD 2.3%～6.8% by the standards were put in seawater.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2010年第4期586-588,共3页
Marine Environmental Science
关键词
固相萃取
气相色谱质谱联用
有机磷农药
海水
solid-phase extraction
gas chromatography-mass spectrometry
organic phosphorus pesticide
seawater
