TEF: Difference between revisions

From Opasnet
Jump to navigation Jump to search
(New page: {{encyclopedia|moderator=Henrik}}TEF (TCDD equivalency factor, toxic equivalency factor), a relative toxicity factor of a PCDD/F or PCB congener as related to TCDD. TEF values vary from 1 ...)
 
No edit summary
Line 1: Line 1:
{{encyclopedia|moderator=Henrik}}TEF (TCDD equivalency factor, toxic equivalency factor), a relative toxicity factor of a PCDD/F or PCB congener as related to TCDD. TEF values vary from 1 to 0.00001 or 0 (Table 4; see also TEq). The latest re-evaluation of TEF values was that by WHO in 1998, and these TEF values have been used in this booklet as WHO-TEF for PCDD/Fs and PCB-TEF for PCBs. TEq = ΣTEFi*Ci, where Ci is the amount (or concentration) of congener i.
{{encyclopedia|moderator=Henrik}}TEF (TCDD equivalency factor, toxic equivalency factor), a relative toxicity factor of a PCDD/F or PCB congener as related to TCDD. TEF values vary from 1 to 0.00001 or 0 (Table 4; see also TEq). The latest re-evaluation of TEF values was that by WHO in 1998, and these TEF values have been used in this booklet as WHO-TEF for PCDD/Fs and PCB-TEF for PCBs. TEq = ΣTEFi*Ci, where Ci is the amount (or concentration) of congener i.  
 
'''Table 4. Toxic equivalency factors for all PCDD/Fs and PCBs that have a TEF>0. Other congeners are not supposed to have dioxin-like effects. IUPAC numbers for PCBs are given in parenthesis.'''
 
{| border="2"
|-
! Congener
! WHO-TEF
|-
| PCDDs
|
|-
| 2,3,7,8-TCDD
| 1
|-
| 1,2,3,7,8-PeCDD
| 1
|-
| 1,2,3,4,7,8-HxCDD
| 0.1
|-
| 1,2,3,6,7,8-HxCDD
| 0.1
|-
| 1,2,3,7,8,9-HxCDD
| 0.1
|-
| 1,2,3,4,6,7,8-HpCDD
| 0.01
|-
| OCDD
| 0.0001
|-
| PCDFs
|
|-
| 2,3,7,8-TCDF
| 0.1
|-
| 1,2,3,7,8-PeCDF
| 0.05
|-
| 2,3,4,7,8-PeCDF
| 0.5
|-
| 1,2,3,4,7,8-HxCDF
| 0.1
|-
| 1,2,3,6,7,8-HxCDF
| 0.1
|-
| 1,2,3,7,8,9-HxCDF
| 0.1
|-
| 2,3,4,6,7,8-HxCDF
| 0.1
|-
| 1,2,3,4,6,7,8-HpCDF
| 0.01
|-
| 1,2,3,4,7,8,9-HpCDF
| 0.01
|-
| OCDF
| 0.0001
|-
| Non-ortho-PCBs
|
|-
| 3,3’,4,4’-TCB (77)
| 0.0001
|-
| 3,4,4’,5-TCB (81)
| 0.0001
|-
| 3,3’,4,4’,5-PeCB (126)
| 0.1
|-
| 3,3’,4,4’,5,5’-HxCB (169)
| 0.01
|-
| Mono-ortho-PCBs
|
|-
| 2,3,3’,4,4’-PeCB (105)
| 0.0001
|-
| 2,3,4,4’,5-PeCB (114)
| 0.0005
|-
| 2,3’,4,4’,5-PeCB (118)
| 0.0001
|-
| 2’,3,4,4’,5-PeCB (123)
| 0.0001
|-
| 2,3,3’,4,4’,5-HxCB (156)
| 0.0005
|-
| 2,3,3’,4,4’,5’-HxCB (157)
| 0.0005
|-
| 2,3’,4,4’,5,5’-HxCB (167)
| 0.00001
|-
| 2,3,3’,4,4’,5,5’-HpCB (189)
| 0.0001
|}

Revision as of 18:01, 12 August 2009

TEF (TCDD equivalency factor, toxic equivalency factor), a relative toxicity factor of a PCDD/F or PCB congener as related to TCDD. TEF values vary from 1 to 0.00001 or 0 (Table 4; see also TEq). The latest re-evaluation of TEF values was that by WHO in 1998, and these TEF values have been used in this booklet as WHO-TEF for PCDD/Fs and PCB-TEF for PCBs. TEq = ΣTEFi*Ci, where Ci is the amount (or concentration) of congener i.

Table 4. Toxic equivalency factors for all PCDD/Fs and PCBs that have a TEF>0. Other congeners are not supposed to have dioxin-like effects. IUPAC numbers for PCBs are given in parenthesis.

Congener WHO-TEF
PCDDs
2,3,7,8-TCDD 1
1,2,3,7,8-PeCDD 1
1,2,3,4,7,8-HxCDD 0.1
1,2,3,6,7,8-HxCDD 0.1
1,2,3,7,8,9-HxCDD 0.1
1,2,3,4,6,7,8-HpCDD 0.01
OCDD 0.0001
PCDFs
2,3,7,8-TCDF 0.1
1,2,3,7,8-PeCDF 0.05
2,3,4,7,8-PeCDF 0.5
1,2,3,4,7,8-HxCDF 0.1
1,2,3,6,7,8-HxCDF 0.1
1,2,3,7,8,9-HxCDF 0.1
2,3,4,6,7,8-HxCDF 0.1
1,2,3,4,6,7,8-HpCDF 0.01
1,2,3,4,7,8,9-HpCDF 0.01
OCDF 0.0001
Non-ortho-PCBs
3,3’,4,4’-TCB (77) 0.0001
3,4,4’,5-TCB (81) 0.0001
3,3’,4,4’,5-PeCB (126) 0.1
3,3’,4,4’,5,5’-HxCB (169) 0.01
Mono-ortho-PCBs
2,3,3’,4,4’-PeCB (105) 0.0001
2,3,4,4’,5-PeCB (114) 0.0005
2,3’,4,4’,5-PeCB (118) 0.0001
2’,3,4,4’,5-PeCB (123) 0.0001
2,3,3’,4,4’,5-HxCB (156) 0.0005
2,3,3’,4,4’,5’-HxCB (157) 0.0005
2,3’,4,4’,5,5’-HxCB (167) 0.00001
2,3,3’,4,4’,5,5’-HpCB (189) 0.0001
Retrieved from "https://en.opasnet.org/index.php?title=TEF&oldid=10697"