【摘要】 建立了同时检测鲭鱼罐头中7种多氯联苯(PCBs)的亚临界水萃取-气相色谱分析方法。亚临界水中加入活性炭纤维为固相萃取剂,在200℃的条件下,提取40 min,随后,用2 mL乙酸乙酯洗脱。结果表明,该方法测定PCBs含量的线性范围为0.001~0.100μg/mL;在2.0、10.0、50.0μg/kg(n=6)的添加水平下,回收率在79.4%~91.0%之间,测定结果的相对标准偏差(RSD)为3.1%~12.3%;检出限(S/N=3)为0.016~0.046μg/kg;定量限(S/N=10)为0.048~0.139μg/kg。该方法绿色环保、稳定、可靠,适用于鲭鱼罐头中多氯联苯的检测。更多还原

【Abstract】 A method for the simultaneous determination of 7 polychlorinated biophenyls(PCBs) in canned Mackerel by sub-critical water extraction coupled with gas chromatography is developed.PCBs are extracted by 200 ℃ sub-critical water for 40 min,and adsorbed on active carbon fibers at the same time.And then,PCBs are desorbed by 2 mL ethyl acetate.The results show that the linear range for the determination of PCBs in canned Mackerel is between 0.001~0.100 μg/mL with the limit of detection(LOD,S/N=3) of 0.016~0.046 μg/kg and the limit of quantification(LOQ,S/N =10) of 0.048 ~0.139 μg/kg.At the spiked level of 2.0、10.0、50.0 μg/kg(n =6),the recoveries range from 79.4% to 91.0% with the relative standard deviations(RSDs) between 3.1% and 12.3%.The developed method is environmentally-friendly and suitable for the simultaneous determination of7 PCBs in canned Mackerel with high accuracy and high precision.更多还原