Abstract
ABSTRACTThe levels of PCDDs, PCDFs and DL-PCBs were analyzed both in milk and adipose tissues sampled “in vivo” from lactating, drying off and heifer buffaloes from a Campania farm which had been impounded by the competent authority owing to the high dioxin levels found in bulk milk. The chemical determination was carried out by HRGC-HRMS using US EPA Method 1613b. The range of WHO-TEQ values for the PCDDs/PCDFs in adipose tissues was 1.79 to 68.64 pg g−1 fat and in milk was 8.33 to 13.95 pg g−1 fat. The contamination profile for dioxins and furans was given by 1,2,3,7,8-PeCDD; 2,3,4,7,8-PeCDF; 1,2,3,6,7,8-HxCDD and 2,3,7,8-TCDD. The levels of DL-PCBs in adipose tissue varied from 1.38 to 20.13 pg g−1 fat while ranged from 8.33 to 13.95 pg g−1 fat in milk. The pattern of DL-PCBs in both matrices was dominated by congeners PCB 126 and PCB 169.
Highlights
Dioxins belong to a group of 75 polychlorinated dibenzop-dioxin congeners (PCDDs) and 135 polychlorinated dibenzofuran congeners (PCDFs), among which 17 are of toxicological concern
Aim of the present study was to investigate the levels of the PCCDs, PCDFs and DL-Polychlorinated biphenyls (PCBs) and evaluate the contamination profile in subcutaneous adipose tissues sampled in vivo from heifers, drying off and lactating buffaloes of an impounded herd of the Campania region during the “dioxin crisis” and to research correlations, if any, with the concentrations in the milk of the lactating animals
Nine dairy buffaloes (Bubalus bubalis), from a farm (Caserta province, Campania region, southern Italy) which had been impounded for a long time since the bulk milk was noncompliant to the PCDDs, PCDFs and dioxin-like PCBs” (DL-PCBs) levels set by Regulation EU No 1259/2011, were selected for the study and divided into three groups
Summary
Dioxins belong to a group of 75 polychlorinated dibenzop-dioxin congeners (PCDDs) and 135 polychlorinated dibenzofuran congeners (PCDFs), among which 17 are of toxicological concern. Aim of the present study was to investigate the levels of the PCCDs, PCDFs and DL-PCBs and evaluate the contamination profile in subcutaneous adipose tissues sampled in vivo from heifers, drying off and lactating buffaloes of an impounded herd of the Campania region during the “dioxin crisis” and to research correlations, if any, with the concentrations in the milk of the lactating animals.
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