Mahindrakar A N, Chandra S, Shinde L P
New Custom House Laboratory, Ballard Estate, Mumbai 400 001, Maharashtra, India.
Chemosphere. 2014 Jan;94:199-202. doi: 10.1016/j.chemosphere.2013.09.006. Epub 2013 Sep 29.
Solid-phase extraction (SPE) of nine polychlorinated biphenyls (PCBs) from transformer oil samples was evaluated using octadecyl (CI8)-bonded porous silica. The efficiency of SPE of these PCBs was compared with those obtained by solvent extraction with DMSO and hexane. Average recoveries exceeding 95% for these PCBs were obtained via the SPE method using small cartridges containing 100mg of 40 pm CI8-bonded porous silica. The average recovery by solvent extraction with DMSO and hexane exceeded 83%. It was concluded that the recoveries and precision for the solvent extraction of PCBs were poorer than those for the SPE.
使用十八烷基（C18）键合多孔硅胶对变压器油样品中的九种多氯联苯（PCBs）进行固相萃取（SPE）评估。将这些多氯联苯的固相萃取效率与用二甲基亚砜（DMSO）和己烷进行溶剂萃取的效率进行比较。通过使用含有100mg 40μm C18键合多孔硅胶的小柱的固相萃取方法，这些多氯联苯的平均回收率超过95%。用二甲基亚砜和己烷进行溶剂萃取的平均回收率超过83%。得出的结论是，多氯联苯溶剂萃取的回收率和精密度比固相萃取的回收率和精密度差。
