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Table 2 Quantitative determinants of internal exposure and relative contribution of main congeners for dioxins, dl-PCBs, ndl-PCBs, OCPs, BFRs and PFAS in dogs

From: Pollutants in pet dogs: a model for environmental links to breast cancer

Chemical family n Minimum Maximum 25-75% Median Main congeners
Dioxins 115 3.57 pg/g 278.29 pg/g 10-27 pg/g 15.59 pg/g OCDD 63%
1234678-HpCDD 24%
123678-HxCDD 5%
2378-TCDD 0.5%
13 others 7.5%
dl-PCBs 115 201.07 pg/g 15776.67 pg/g 515-1545 pg/g 829.90 pg/g PCB-118 36%
PCB-156 26%
PCB-189 22%
PCB-105 7%
PCB-157 5%
PCB-167 2%
PCB-114 1.5%
5 others 0.5%
ndl-PCBs 115 0.78 ng/g 99.52 ng/g 2-9 ng/g 4.28 ng/g PCB-180 61%
PCB-153 31%
PCB-138 6%
3 others 2%
OCPs 94 0.50 ng/g 63.92 ng/g 6-15 ng/g 5.30 ng/g HCHs 67%
Oxychlordane 13%
Dieldrin 10%
HCB 5%
Pentachlorobenzene 3%
Cis-heptachlor epox. 2%
BFRs 115 1.63 ng/g 272.95 ng/g 9-24 ng/g 16.93 ng/g PBDE-209 85%
HBCD-α 9%
PBDE-153 3%
9 others 3%
PFAs 62 0.50 ng/ml 30.81 ng/ml 3-8 ng/ml 4.91 ng/ml PFOS 49%
PFHxS 25%
PFNA 12%
PFOA 10%
12 others 4%