【摘要】 气相色谱-串联质谱法同时测定污水中18种多氯联苯有机污染物的含量。采用液液萃取法萃取污水样中的共平面多氯联苯，萃取液经脱水、浓缩、净化和定容后经气相色谱-质谱法分离和测定。18种多氯联苯有机污染物在0～100μg/L范围内其对应的峰面积呈线性关系，方法检出限为1.4～2.2 ng/L,测定下限为5.6～8.8 ng/L。在2,10,20,100 ng/L等四个浓度水平下进行加标回收实验，回收率为90%～113%,精密度(RSD)1.61%～6.71%。更多还原

【Abstract】 Simultaneous determination of 18 polychlorinated biphenyl compoundsoil field in water by gas chromatography-tandem mass spectrometry.The coplanar polychlorinated biphenyls in the water samples were extracted by liquid-liquid extraction.The extracts were separated and determined by gas chromatography-mass spectrometry after dehydration, concentration, purification and constant volume.The corresponding peak areas of 18 polychlorinated biphenyl compounds in 0～100 μg/L were linear.The detection limit(3 S/N) was 1.4～2.2 ng/L and the lower limit was 5.6～8.8 ng/L.The spiked recovery experiment was carried out at four concentration levels of 2,10,20,100 ng/L.The recovery was 90%～113%,and the precision(RSD) was 1.61%～6.71%.更多还原