Collect. Czech. Chem. Commun. 1991, 56, 1221-1227

Determination of 2,3,7,8-tetrachlorodibenzo-p-dioxin in soil in the presence of large excess of chlorinated hydrocarbons

Anton Kočana, Alexandr Zemekb and Milan Poplc

a Research Institute of Preventive Medicine, 833 01 Bratislava
b Chemopetrol Spolana, 277 11 Neratovice
c Department of Analytical Chemistry, Prague Institute of Chemical Technology, 126 28 Prague 6


The paper describes a method of 2,3,7,8-TCDD determination in soils heavily contaminated with organic compounds ( the soil from areas of plants producing pesticides, chlorophenols, etc.). The procedure is based on a sample extraction with a hexane-acetone mixture, cleaning of the extract by washing with potassium hydroxide and sulfuric acid solution and by liquid chromatography on a multilayer modified silica column and aluminia columns, and on GC/MS determination using a labelled internal standard (13C-2,3,7,8-TCDD). The determination limit is 10 ppt and the average recovery 55%.