1978 Volume 27 Issue 7 Pages 452-454
The method of entrainment distillation with water was applied to the analysis of bottom sediments for PCB. The apparatus for volatile oil determination was slightly modified to prevent the following troubles, that is, foaming and bumping of the sample solution and evaporation of the extracting solvent during distillation of PCB from a sediment sample. Analytical results obtained by this method were in good correlation with those by the solvent extraction method but the former gave somewhat higher results than the later. Moreover, reproducibility of the distillation method was better than that of the solvent extraction method, the coefficient of variation being 6.5% and 8.2%, respectively.
