Abstract
In general, various substances in solid phase samples (e.g. water,carbons etc.)could hinder the determination of PCDDs/DFs.To control the moisture in samples, EPA and JIS adopt the method of airing or using of anhydrous sodium sulfate,however,these methods would be time-consuming and suspicious in effectiveness.Thus,in this study,solvents of acetone and toluene successively would be used in soxhlet/dean-stock soxhlet extraction of solid-phase samples containing moisture, and the results are compared to the other results described above.
While,most of incineration plants for municipal solid wastes are using the activated carbons to control PCDDs/DFs in flue gas.It is well known that PCDDs/DFs adsorbed in/on activated carbons or unburned carbons in ash are very difficult to be extracted by soxhlet extraction method. This study would also evaluate the effect of activated carbons on extraction efficiency and suggest the proper extraction solvents for activated carbons-containing samples.
