 鲜花( 13)  鸡蛋( 1)
|
Human Health Risk Assessment of Mercury in Fish March 2007
1 u+ M4 ], ?, ?+ L% z) Pand Health Benefits of Fish Consumption
, F5 _% C$ K7 Q/ T/ w/ O _8 yWith respect to the types of mercury found in fish, both inorganic and organic mercury may be5 _% _$ o& g/ M! C
present. However, methyl mercury is the predominant form of mercury in fish. It’s chemical
; c) s( N# ^8 e/ Jproperties allow it to rapidly diffuse and tightly bind to proteins in aquatic biota, including the
9 M0 ^8 e, b$ T3 n/ [/ v2 K, oproteins in the muscle tissue of fish. This leads to bioaccumulation in the fish, with the mercury
3 q" ?3 i, V: M* Mlevel increasing with age of the fish. In turn, bio magnification along the food chain leads to
9 A& _0 d. t5 v* \. mhigher mercury levels in piscivorous fish that are higher in the food chain than in fish and other
2 c/ w: J! P2 u/ j* Norganisms that are low in the food chain. Inorganic mercury can also bio accumulate but to a far5 g3 L( K. a# c {7 S
lesser extent than methyl mercury.7 H) R$ k( h) [# w+ z5 S" `
APPENDIX I
" S3 T# Y, d7 q+ X* M4 @Summary data for those samples of fish that were found by the Canadian Food Inspection Agency/ S6 H1 x! a# c7 u3 s5 N8 o% [
(unless otherwise noted) to contain, on average, approximately 0.2 ppm or less total mercury.% K) C$ p: r; d6 r. r' _% e
Samples were collected at the importers= or at domestic processing plants during the periods April 1,
3 p' v( M" _& p: D2 l2002 to March 31, 2003 and April 1, 2003 to October 7, 2004 (unless otherwise noted). A
$ H# D7 c+ N8 t, C2 b7 |( ~5 Gconcentration of zero indicates that mercury was not detected above the analytical detection limit.
# _ Z: W4 {9 ]/ s. {% |Total Mercury Concentration
! U8 r! @2 T" S. g' \& }(ppm) m/ k. H# ]- u5 E8 R0 N7 U7 \& K4 }. z3 f
Species
. o' l7 d( v: ]- k- s( Z. l3 aNo. of
* h) j) V" c: q; wsamples
$ y" f! O& n2 E# D9 `(N) Mean Median Min Max
# }+ t& n6 g3 v' j* ZAmberjacks 3 0.17 0.14 0.11 0.27$ X+ o+ M) F6 Y/ h- v8 V& I- F1 r z
Barracouta 1 0.06 0.06 0.06 0.06
; l3 u" T% I ]3 `4 E: Y/ K J4 L5 CBasa 5 0.02 0.02 0.02 0.02
( N. n) p. b: J, C% TBullhead, Brown 2 0.09 0.09 0.07 0.1! o* [0 ]. n$ _/ A
Capelin 4 0.02 0.02 0 0.05
8 y' {, w3 e/ k6 S/ H/ e/ TCarp 1 0.1 0.1 0.1 0.1' S/ N" Z, J% q3 D6 A0 T' E
Catfish (Channel or unspecified) 16 0.15 0.14 0.02 0.37
: b0 G1 d- ~. p$ z# Q7 A6 @+ uChar, Arctic 5 0.09 0.10 0.05 0.05
/ q1 ^* O4 v* J" O6 {. Q+ SClam (various species) 40 0.03 0.01 0 0.080 Y. C" u" o( ?8 B
Cockle, Greenland 1 0.05 0.05 0.05 0.055 C( f% ~& R6 O$ k. b. l
Cod (Atlantic, Pacific or unspecified) 34 0.06 0.06 0 0.28
8 r) V# T$ l9 R) mCrab (Dungeness, Rock, Snow) 19 0.09 0.07 0 0.37
* l1 v" ~' Y, V# g0 a' UCrawfish 1 0.1 0.1 0.1 0.1
2 |1 y8 h. l& \4 @' ODrum, Freshwater 2 0.22 0.22 0.03 0.4- i1 ?% _# i/ A
Eel (American, Conger/sea, Spiny/spotted) 52 0.19 0.10 0 0.76
; F/ x4 k6 P- ~7 KEel (species not specified) 107 0.24 0.16 0.01 1.70
2 I: u) H" i5 Q$ b# i/ k' G6 QFlounder (various species) 22 0.06 0.06 0.03 0.125 @$ P& u3 Z+ H" r( f
Haddock 3 0.05 0.05 0.03 0.07 |
|
楼主: 爱网观察员
狗仔卡
楼主
显身卡
发表于 2012-10-27 10:21
