 鲜花( 13)  鸡蛋( 1)
|
Human Health Risk Assessment of Mercury in Fish March 2007
. ~3 N* U5 W9 p- tand Health Benefits of Fish Consumption
; i9 r5 C4 L( z6 p, |0 sWith respect to the types of mercury found in fish, both inorganic and organic mercury may be/ P8 Q0 g: q! m2 M" d+ T
present. However, methyl mercury is the predominant form of mercury in fish. It’s chemical
0 P' m( b6 j3 Zproperties allow it to rapidly diffuse and tightly bind to proteins in aquatic biota, including the* k! ?0 m; X) `
proteins in the muscle tissue of fish. This leads to bioaccumulation in the fish, with the mercury
; [+ @4 @2 k5 Rlevel increasing with age of the fish. In turn, bio magnification along the food chain leads to
+ F2 N4 b" ^0 n9 P9 thigher mercury levels in piscivorous fish that are higher in the food chain than in fish and other4 f& ~2 t2 T- Z
organisms that are low in the food chain. Inorganic mercury can also bio accumulate but to a far9 z0 r4 ~! }, P1 O
lesser extent than methyl mercury.
6 D7 q1 O" g" Y9 eAPPENDIX I
4 `5 H z4 r) R/ Y, L4 e3 JSummary data for those samples of fish that were found by the Canadian Food Inspection Agency/ B+ d) _/ W" t- w
(unless otherwise noted) to contain, on average, approximately 0.2 ppm or less total mercury.
( b- g$ y& X( ^6 v* gSamples were collected at the importers= or at domestic processing plants during the periods April 1,
. A) @' ^7 E \( Y: M2002 to March 31, 2003 and April 1, 2003 to October 7, 2004 (unless otherwise noted). A: t& ?; K4 m# t& L% t
concentration of zero indicates that mercury was not detected above the analytical detection limit.
; Y5 x# b# b" g( h2 \+ T& L/ nTotal Mercury Concentration
2 {8 b/ f% t p! d2 K(ppm)
4 j) ? J+ c8 Z* n! ySpecies
9 x1 s* e( ?2 l" [9 H3 Q8 b0 ^9 LNo. of
& {4 k8 O% v5 S* P" M6 Ysamples6 g$ D- A/ N7 R
(N) Mean Median Min Max6 _( ~8 y7 }4 z5 T$ u! O9 `
Amberjacks 3 0.17 0.14 0.11 0.27, _/ i" |2 \# T6 P' G) E, f
Barracouta 1 0.06 0.06 0.06 0.06
: k% |$ E1 L' M# C* g+ fBasa 5 0.02 0.02 0.02 0.02( a3 r( W6 s0 X8 r0 I P6 I
Bullhead, Brown 2 0.09 0.09 0.07 0.15 f0 L" F# d6 ?+ }9 ^- k% t
Capelin 4 0.02 0.02 0 0.05
! d. [$ j b: b# ~, ]Carp 1 0.1 0.1 0.1 0.1
) l- e6 i/ F' \- N% _Catfish (Channel or unspecified) 16 0.15 0.14 0.02 0.37( E; L! t+ u+ Y: E
Char, Arctic 5 0.09 0.10 0.05 0.058 m' L8 p- n! Y U b
Clam (various species) 40 0.03 0.01 0 0.08
3 |( J7 ?1 G% ~: P9 n; \' kCockle, Greenland 1 0.05 0.05 0.05 0.057 Q2 Y6 T2 n5 z1 q3 S; L& e
Cod (Atlantic, Pacific or unspecified) 34 0.06 0.06 0 0.28
/ h* m' V8 K) D( T, NCrab (Dungeness, Rock, Snow) 19 0.09 0.07 0 0.37
# t2 ?4 {1 b) S4 y2 F2 aCrawfish 1 0.1 0.1 0.1 0.1! A% U# }( a& F4 y- v, Y
Drum, Freshwater 2 0.22 0.22 0.03 0.49 F6 W6 D& r$ `+ s3 Y: V
Eel (American, Conger/sea, Spiny/spotted) 52 0.19 0.10 0 0.76* O2 _( y; j0 _& l8 i$ o# ?) m4 m
Eel (species not specified) 107 0.24 0.16 0.01 1.70' `: T8 G1 M+ D3 K
Flounder (various species) 22 0.06 0.06 0.03 0.12* m+ \4 s9 {0 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
