 鲜花( 13)  鸡蛋( 1)
|
Human Health Risk Assessment of Mercury in Fish March 2007( L' ~" l0 j" `
and Health Benefits of Fish Consumption& ~, n1 z! B0 F1 v3 o
With respect to the types of mercury found in fish, both inorganic and organic mercury may be
" Y. F- z; ^8 _% X$ _present. However, methyl mercury is the predominant form of mercury in fish. It’s chemical
8 e7 M6 Z; `* q2 Q( \! mproperties allow it to rapidly diffuse and tightly bind to proteins in aquatic biota, including the
1 O" w3 _ t0 r# ]2 zproteins in the muscle tissue of fish. This leads to bioaccumulation in the fish, with the mercury
7 r; x3 ^2 L h3 @) jlevel increasing with age of the fish. In turn, bio magnification along the food chain leads to
" e Q( ?. j' s; Jhigher mercury levels in piscivorous fish that are higher in the food chain than in fish and other( y7 w3 A1 `! {7 B# }9 z
organisms that are low in the food chain. Inorganic mercury can also bio accumulate but to a far
% f6 m0 s3 b3 f; c& T5 S, ]lesser extent than methyl mercury.
! x$ s# q0 |8 |5 j! QAPPENDIX I
2 Y3 y2 Z) u: W& @6 PSummary data for those samples of fish that were found by the Canadian Food Inspection Agency# u) J7 o+ P9 Q2 c
(unless otherwise noted) to contain, on average, approximately 0.2 ppm or less total mercury.+ o+ |& x( X- ~) W
Samples were collected at the importers= or at domestic processing plants during the periods April 1,
: [) F! G) s+ ^9 f2002 to March 31, 2003 and April 1, 2003 to October 7, 2004 (unless otherwise noted). A5 j0 W4 p: P- N' J( z5 T8 o
concentration of zero indicates that mercury was not detected above the analytical detection limit. }# ]8 z! ?' }
Total Mercury Concentration7 [, T+ v! X, I; {+ \! U
(ppm)
1 v6 j7 R4 o8 X: U% i% XSpecies
, v7 z! |0 @1 @; [% r1 D. oNo. of$ l" d0 {0 v5 n2 P( E
samples, A% c7 @5 Q! ~- ]4 ^
(N) Mean Median Min Max2 f3 e$ z" q6 F& s! z* g$ w8 H* {
Amberjacks 3 0.17 0.14 0.11 0.27! _3 ^% N0 V; {3 t" r/ r
Barracouta 1 0.06 0.06 0.06 0.06- E6 n, t8 G: B8 o& f* P6 W& h
Basa 5 0.02 0.02 0.02 0.02
1 o5 p3 M2 e( m8 T7 IBullhead, Brown 2 0.09 0.09 0.07 0.1
& o B7 U X6 d7 _& r; d @Capelin 4 0.02 0.02 0 0.05
% G) h- k8 a# J; i$ ?0 m, N% XCarp 1 0.1 0.1 0.1 0.1
0 N% F) F3 g$ J+ L, dCatfish (Channel or unspecified) 16 0.15 0.14 0.02 0.376 }! m( w6 l) G( g& t
Char, Arctic 5 0.09 0.10 0.05 0.058 i# j6 m3 q8 d' ~3 }* g" E ]
Clam (various species) 40 0.03 0.01 0 0.083 a% W5 t8 g4 o0 K# @8 A/ f
Cockle, Greenland 1 0.05 0.05 0.05 0.05; G8 b4 y$ B: i( [
Cod (Atlantic, Pacific or unspecified) 34 0.06 0.06 0 0.287 k7 D @' L2 ? p- T6 r
Crab (Dungeness, Rock, Snow) 19 0.09 0.07 0 0.379 J2 k( m6 b+ Y/ _. L7 X7 q1 j. h
Crawfish 1 0.1 0.1 0.1 0.1' s, W$ {, }1 p( J' [& _$ k$ \0 }
Drum, Freshwater 2 0.22 0.22 0.03 0.4
' o `7 C4 [) zEel (American, Conger/sea, Spiny/spotted) 52 0.19 0.10 0 0.76
% Y) y; Z( h3 N: g- V1 mEel (species not specified) 107 0.24 0.16 0.01 1.70& G. P" D+ c. J
Flounder (various species) 22 0.06 0.06 0.03 0.12
) V3 ^1 w4 m$ ^% y! S# {' ^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
