. 2019 May 28;8(4):552–559. doi: 10.1039/c8tx00337h

Table 2. Mass concentrations and TEQs of PCDD/Fs and DL-PCBs and their constituent ratios in human milk samples from Guangdong Province, China.

Compound	Mass concentration (pg g^–1 lipid)			TEQ (TEF_{WHO 2005}, pg TEQ per g lipid)		TEQ (TEF_WHO1998, mean, pg TEQ per g lipid)
Compound	Mean	Range	Percent contribution ^a	Mean	Percent contribution ^b	TEQ (TEF_WHO1998, mean, pg TEQ per g lipid)
1,2,3,7,8-PeCDD	2.55	1.75–3.31	0.79	2.55	28.05	2.55
2,3,7,8-TCDD	0.58	0.31–0.81	0.18	0.58	6.38	0.58
1,2,3,6,7,8-HxCDD	5.11	3.22–8.89	1.58	0.51	5.61	0.51
1,2,3,4,6,7,8-HpCDD	33.73	15.9–70.17	10.44	0.34	3.74	0.34
1,2,3,4,7,8-HxCDD	1.12	0.49–1.59	0.35	0.11	1.21	0.11
1,2,3,7,8,9-HxCDD	1.02	0.74–1.55	0.32	0.10	1.10	0.10
OCDD	260.96	126.47–561.95	80.77	0.08	0.88	0.03
2,3,4,7,8-PeCDF	6.54	4.44–10.35	2.02	1.96	21.56	3.27
1,2,3,4,7,8-HxCDF	2.9	2.24–3.67	0.90	0.29	3.19	0.29
1,2,3,6,7,8-HxCDF	2.49	2.05–3.51	0.77	0.25	2.75	0.25
2,3,7,8-TCDF	0.71	0.56–0.86	0.22	0.07	0.77	0.07
2,3,4,6,7,8-HxCDF	0.62	0.31–0.97	0.19	0.06	0.66	0.06
1,2,3,7,8-PeCDF	0.72	0.52–0.98	0.22	0.02	0.22	0.04
1,2,3,4,6,7,8-HpCDF	2.55	1.36–3.76	0.79	0.03	0.33	0.03
1,2,3,7,8,9-HxCDF	0.03	ND-0.083	0.01	0.003	0.03	0.003
1,2,3,4,7,8,9-HpCDF	0.15	0–0.33	0.05	0.002	0.02	0.002
OCDF	1.35	0.31–2.92	0.42	0.0004	0.004	0.0001
PCB 126	16.56	10.85–24.54	0.76	1.656	18.21	1.656
PCB 169	13.63	6.92–18.7	0.63	0.409	4.50	0.136
PCB 118	1088.73	710.65–1316.82	50.25	0.033	0.36	0.109
PCB 77	8.74	4.43–13.84	0.40	0.001	0.01	0.001
PCB 81	3.41	2.07–5.76	0.16	0.001	0.01	0.0003
PCB 105	339.21	225.59–398.99	15.66	0.010	0.11	0.034
PCB 114	81.94	51.67–95.22	3.78	0.002	0.03	0.041
PCB 123	19.82	14.98–25.18	0.92	0.001	0.01	0.002
PCB 156	350.84	239.02–409.36	16.19	0.011	0.12	0.175
PCB 157	100.01	58.70–121.80	4.62	0.003	0.03	0.050
PCB 167	103.22	66.24–122.71	4.76	0.003	0.03	0.001
PCB 189	40.47	27.9–45.95	1.87	0.001	0.01	0.004
∑PCDDs	305.06	150–647.72	94.42	4.27	46.97	4.22
∑PCDFs	18.04	14.33–26.21	5.58	2.69	29.59	4.01
∑PCDDs/Fs	323.10	167.37–662.6	12.98	6.96	76.57	8.23
∑DL-PCBs	2166.58	1419.02–2598.87	87.02	2.13	23.43	2.21
∑(DL-PCBs + PCDDs/Fs)	2489.68	1586.39–3261.47	100.00	9.09	100.00	10.44

^aPercent contribution of each PCDD/F congener, ∑PCDDs and ∑PCDFs to ∑PCDD/Fs, and percent contribution of each DL-PCB congener to ∑DL-PCBs, and percent contribution of ∑PCDD/Fs and ∑DL-PCBs to ∑(PCDD/Fs + DL-PCBs);

^bContribution of each PCDD/F and DL-PCB congener, ∑PCDDs, ∑PCDFs and ∑PCBs to ∑(DL-PCBs + PCDD/Fs).