Concentration and distribution of polychlorinated dibenzo-p-dioxins -PCDD- and polychlorinated dibenzofurans -PCDF- in wood ash

Results are reported for the analysis of the PCDD and PCDF contents of different kinds of wood ash. Ash samples were received from firing plants of the wood working industry, from a smoke house and from the combustions of impregnated wood in a laboratory two-stage furnace. It is shown that a relation exists between the PcDD/PCDF content and the type of ash.