Determination of PCDD/Fs and dioxin-like PCBs in chinese commercial PCBs and emissions from a testing PCB incinerator

Large amounts of polychlorinated biphenyls (PCBs) had been produced in China. In order to dispose of them appropriately, a set of experimental PCB incinerators have been manufactured in China. The 2,3,7,8-substituted toxic polychlorinated dibenzodioxins and furans (PCDD/Fs) congeners in stack ash and bottom ash samples from the incinerator and technical products #1PCB and #2PCB (for the reason of comparison) were measured. In addition, the levels of these toxic congeners were converted to 2,3,7,8-TCDD TEQ. Moreover, levels of dioxin-like PCB congeners and 2,3,7,8-TCDD TEQ values in two types of commercial PCBs products and stack ash were determined.