Dioxins, dioxin-like PCBs and non-dioxin-like PCBs in dairy products on the German market and the temporal tendency in Schleswig-Holstein

Ruoff, Ulrike; Haßler, Karl; Walte, Hans-Georg

doi:10.1007/s00003-011-0751-y

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…Most PCDD/Fs were rarely detected in controls (mean 0.05 ± 0.03 pg WHO 2005 -PCDD/F-TEQ/g milk fat). These background levels are well below current EU regulation limits , and are typical for dairy products on the German market. , …”

Section: Resultsmentioning

confidence: 64%

“…These background levels are well below current EU regulation limits 5,7 and are typical for dairy products on the German market. 61,62 In milk fat samples of the experimental group, most congeners showed a distinctive increase during the dosing phases and a decrease during the depuration phases (Figure 2). This was less pronounced for OCDD and OCDF and was not observable for the low-chlorinated indicator ndl-PCBs (PCB-28, -52, and -101) due to highly fluctuating background values.…”

Section: Pcdd/fs and Pcbs In Milkmentioning

confidence: 99%

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Experimental Study on the Transfer of Polychlorinated Biphenyls (PCBs) and Polychlorinated Dibenzo-p-dioxins and Dibenzofurans (PCDD/Fs) into Milk of High-Yielding Cows during Negative and Positive Energy Balance

Krause,

Lamp,

Knappstein

et al. 2023

J. Agric. Food Chem.

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Dioxin-like polychlorinated biphenyls (dl-PCBs) as well as polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) are a major concern for food safety, especially in fat-containing foods of animal origin, such as milk. Due to the lipophilic character of PCDD/Fs and PCBs, it is of special interest to explore whether the metabolic state of high-yielding cows influences the transfer rates into milk. Five German Holstein cows were orally exposed to a mixture of 17 PCDD/Fs, 12 dl-PCBs, and 6 non-dioxin-like PCBs (ndl-PCBs) for two dosing periods of 28 days each. The first period covered the negative energy balance (NEB) after calving, while the second period addressed the positive energy balance (PEB) in late lactation. Each dosing period was followed by a depuration period of around 100 days. During the NEB phase, the transfer rates of 14 PCDD/Fs and 7 dl-PCBs quantified were significantly (p ≤ 0.1) higher compared to the PEB phase, indicating an influence of the metabolic state on the transfer. Furthermore, the congener-specific transfer rates (0.3−39%) were in the range of the results from former studies. This indicates that the milk yield of the exposed cows is not the only determining factor for the transfer of these congeners into milk.

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