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Hexachlorobenzene and 1, 1-di(4-Chlorophenyl)-2,2-Dichloroethene in Serum of Uremic Patients and Healthy Persons: Determination by Capillary Gas Chromatography and Electron Capture Detection
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Abstract
The concentrations of organochlorine pesticides in serum have been determined by GC
and electron capture detection. Studies were performed in 7 nondialyzed, 10 dialyzed
and 6 healthy persons. Only hexachlorobenzene (HCB) and 1, 1-di(4-chlorophenyl)-2,2-dichloroethene
(pp’-DDE) were consistently present. No interference by other pesticides or polychlorinated
biphenyls was found by checking with GC-MS. For the nondialyzed uremic patients the
average HCB concentration was 16.2 nmol/l (σ = 6.7, n = 7), and the pp’-DDE level
26.4 nmol/l (σ = 31.4, n = 7). For the dialyzed uremic patients the average HCB level
was 15.5 nmol/l (σ = 11.2, n = 10) before dialysis and 17.2 nmol/l (σ = 14.4, n =
8) after dialysis, the concentration of pp’-DDE was 27.0 nmol/l (σ = 38.4, n = 10)
before dialysis and 28.0 nmol/l (σ = 37.4, n = 8) after dialysis. For the healthy
persons the average concentration of HCB was 7.7 nmol/l (σ = 1.8, n = 6) and the concentration
of pp’-DDE was 20.1 nmol/l (σ = 10.4, n = 6). HCB concentrations were significantly
higher in serum of dialyzed and nondialyzed uremic patients than in controls (Wilcoxon’s
test).