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环境化学  2015 

DOI:10.7524/j.issn.0254-6108.2014.04.008

Keywords: 地表水,致癌芳香胺,液相色谱-串联质谱,直接测定

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Abstract:

建立了超高效液相色谱-串联质谱(UHPLC-MS/MS)快速直接测定地表水中致癌芳香胺物质的方法.样品采集后,用0.22μm的聚四氟乙烯(PTFE)滤膜过滤,用C18RRHD色谱柱进行梯度洗脱分离,流动相为甲醇和水,采用电喷雾正离子模式,并采用多反应监测模式(MRM)测定,外标法定量.方法重点优化了色谱分离条件、质谱碎裂电压、碰撞能量,考察了流动相中甲酸铵或甲酸浓度对目标化合物响应的影响.23种组分不同浓度水平的加标回收率在70.3%—119.8%之间,相对标准偏差在2.1%—10.2%(n=7)之间,方法的定量限(LOQ)在0.01—2.0μg·L-1之间.方法具有操作方便、灵敏度较高、快速准确的优点,能为环境水体污染源监测、饮水安全提供技术保障.

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