中文摘要：

采用稳定同位素标记的多氯萘（PCNs）同类物为内标,建立了同位素稀释气相色谱/三重四极杆串联质谱技术测定环境样品中20种高关注的PCNs同类物的方法。结果表明：PCNs同类物的校正曲线在0.5～200μg/L范围内线性良好（R2〉0.99）,检出限（LOD）为0.04～0.48μg/L,相对标准偏差（RSD）小于15%。采用基质加标法评价该方法对实际环境样品中PCNs测定的回收率为45.2%～87.9%。为验证方法的适用性,以河流沉积物和再生铝冶炼排放的烟道气样品为对象,利用所建立的方法测定了20种PCNs同类物,并将结果与高分辨气相色谱/高分辨质谱方法的测定结果进行了比对,两种方法测定结果的RSD为0.5%～41.4%,表明所建立的同位素稀释气相色谱/三重四极杆串联质谱方法可用于实际环境样品中PCNs的定性、定量分析。

英文摘要：

An isotope dilution gas chromatography combined with triple quadrupole mass spec- trometry （GC-MS/MS） method was established for the analysis of twenty polychlorinated naph- thalenes （PCNs） congeners in environmental samples. The linear correlation coefficients （R2） of calibration curves were greater than 0.99 in the concentration range of 0.5 - 200 g/L for all the twenty PCN congeners. The average relative response factors （RRF） were calculated based on a seven-point calibration for the twenty PCN congeners. The relative standard deviations （RSDs） of all the congeners were below 15% （ n = 7）. The limits of detection （LOD） of the established method ranged from 0.04 to 0.48 g/L for the twenty PCN congeners. The recover- ies of matrix spiked samples ranged from 45.2% to 87.9%, and the RSDs ranged from 0.4% to 21.2%. The sediment samples and stack gas samples collected from secondary aluminum smel- ting were analyzed by the established method. The obtained results were also compared with the data analyzed by high resolution gas chromatography/high resolution mass spectrometry （HRGC/HRMS） method. The comparison indicated that the data of the established method was in good agreement with those of HRGC/HRMS method with the RSDs of 0.5% -41.4%. Conse-quently, the established GC-MS/MS method can be applied to the determination of PCNs in environmental samples.