The subject of our study is to set time and coast effective extraction method for Polychlorinated biphenyls found in soils by the use of microwave extraction system Mars-X-traction (CEM) which is followed by GC-MS analysis. According to the literature Soxhlet extraction of mentioned compounds is widespread applying method; our study is presented an easy and simple method of sample preparation of 10 PCB (PCB congener numbers: 18, 28, 31, 101, 118, 138, 149, 153, 180 and 194) compounds from soil. Microwave assisted extraction procedure is applied by; weight of 0.5g soil (CRM) in PTFE capped reaction vessel (4mL) ; spike at concentration of 1000�g/kg with PCB congeners; adding ~1g Sodium sulphate anhydrous and 2mL of solvent mixture hexan:acetone (1:1), then subjected the sample to the microwave system at  50oC within 15min. extraction time. The supernatant of centrifugated solution is transferred to the Kuderna-Danish evaporator and final volume is adjusted to the 500�L. GC-MS analysis is performed by injection of 1�L volume of sample solution. Experiments were carried out in 3 parallels and each one solution is injected 3 times. Recoveries of 99% - 105% were obtained for target compounds while RSD% varied between %2 and %5. Results showed that method is fast and reproducible for analysis of PCB congeners in soil samples

Effective one-step microwave extraction of PCB congeners from soil followed by GC-MS analysis

247th National Meeting (2014)

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