STUDY ON ANALYSIS PROCEDUREFOR DETERMINING PeCB IN COMBUSTIONWASTE

Abstract

      Pentachlorobenzene (PeCB) is one of Persistent Organic Pollutants (POPs). PeCB was unintended generated by the combustion of the waste from incinerator. Process analysis PeCB after surveys in different conditions of sample processing procedures and setup programs in GC (ECD) device is using soxhlet extraction with solvent mixed acetone-hexane at ratio 1/1 of volume, cleaning by amixed silicagel:carbon active at ratio 9/1 of weight and with DCM/n-hexane solven at ration 1/3 of volume. The influence of Polychlorinated biphenyl (PCB) is negligible, the influence of sulfur is removed with copper powder. The last solution of sample processing procedures was running on the optimal program GC device (ECD) have high recovery (80-120%) and small standard error(<2%).The quantification and detection limits of the method are 1,5 μg/kg and 0,5 μg/kg, respectively. The analysis results show that the PeCB contents in the ash of the four incinerators in the northern region have mean value recovery and coefficient of variation are 92.75% and 10.55%.

Keywords: PeCB, dichloromethane (DCM), acetone, incinerator, waste.