气相色谱-三重四极杆质谱联用测定沉积物中的多氯联苯

摘要

建立索氏提取-气相色谱三重四极杆质谱多反应监测同时测定沉积物中19种多氯联苯单体的方法，确定19种多氯联苯化合物多反应监测模式（MRM）的最佳质谱条件。方法检出限为0．020～0．025μg／kg，以不含目标物的沉积物作为空白基体，加入19种不同浓度水平的多氯联苯作回收试验，测得回收率为82％～111％，测定的相对标准偏差均小于7．3％。%A method for determining 19 polychlorinated biphenyl compounds in sediment was established by Soxhlet extraction and GC/MS/MS. The optimal mass spectrometry condition of the multiple reaction monitoring (MRM) modes for 19 polychlorinated biphenyl compounds was determined. The lower limits of determination were between 0. 020μg/kg and 0. 025μg/kg. Average recoveries of the 19 polychlorinated biphenyl compounds were typically in the range 82 % - 111% with relative standard deviations being generally less than 7.3 %.