Determination of organochlorines in river sediment by capillary gas chromatography
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| Keywords |
Marine/Coastal; Brackish water; Fresh water |
| Authors | | Top |
- Wegman, R.C.C.
- Hofstee, A.W.M.
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| Abstract |
An analytical method is described for the capillary gas chromatographic determination of 17 organochlorines, such as HCB, α-, β- and γ-HCH, aldrin, dieldrin, endrin, isodrin, telodrin, C-601 (1,2,3,4,7,7-hexachlorobicyclo-[2,2,1]-heptadieen-2,5), C-773 (1,2,3,4,5,7,7-heptachlorobicyclo-[2,2,1]-hepteen-2), heptachlor, β-heptachlorepoxide and the DDT-complex, in soil and river sediment. C-601 and C-773 are by-products of the aldrin and dieldrin synthesis. Several solvents were compared for the extraction from clay, peat and river sediment. Acetone gave the best results, also after a long period between spiking of soil and sediment samples with organochlorines and extraction. 14 Organochlorines were determined without interference from PCBs. The analysis of heptachlor, aldrin and p·p′-DDT can be interfered with by PCB components. The results of a monitoring program in tributaries of the Rhine River, Western Scheldt and in some harbour basins of Rotterdam are presented. HCB occurred frequently. The most contaminated sediment was found in a harbour basin near a pesticide producing plant. In this sediment the mean concentrations were 0.86 mg kg-1 and 0.18 mg kg-1 for dieldrin and endrin, respectively, on a dry weight basis. |
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