Research of the method treatment for determination of PCBs in sediment by GC
气相色谱测定沉积物中多氯联苯的样品处理方法研究

The sediment of ocean was extracted respectively by microware extraction, ultrasonic extraction and Soxhlet extraction, and the extracted were purified through Florisil column or concentrated sulfuric acid cleanup. The recovery and precision experiment were both conducted to compare the three extractions and the two cleanup methods. A method for the determination of PCBs in sediment of ocean has been developed, which was extracted with microwave extraction and Florisil column cleanup, and the detection could be achieved by gas chromatography with electron-capture detection(ECD). The results showed that with this method satisfactory recoveries 77.3%~94.6%, relative standard deviation(RSD)2.19%~8.71% and detection limits 0.027~0.064 ng/g could be obtained. It was confirmed that the method could be used in sediment by the determination of PCBs in Weihai Bay.