 鲜花( 13)  鸡蛋( 1)
|
Human Health Risk Assessment of Mercury in Fish March 2007! u% L: h0 z' i/ X+ E
and Health Benefits of Fish Consumption
$ F. E3 [6 v0 `+ L0 ]4 ZWith respect to the types of mercury found in fish, both inorganic and organic mercury may be+ R& z6 i& Z( d9 H4 Y& H2 Z
present. However, methyl mercury is the predominant form of mercury in fish. It’s chemical
. B, I3 L7 l7 G2 aproperties allow it to rapidly diffuse and tightly bind to proteins in aquatic biota, including the
4 o! x; |2 t8 b, \4 ?proteins in the muscle tissue of fish. This leads to bioaccumulation in the fish, with the mercury
5 f5 Z+ A/ ^. @; o$ O% zlevel increasing with age of the fish. In turn, bio magnification along the food chain leads to0 R+ k' c+ l: M/ X) G, Z& `
higher mercury levels in piscivorous fish that are higher in the food chain than in fish and other/ o! B' _9 h) \" }8 W8 H0 Y$ R
organisms that are low in the food chain. Inorganic mercury can also bio accumulate but to a far# W( Q0 V0 V& {7 Z
lesser extent than methyl mercury.
6 v1 @ _+ o$ b6 C; z' cAPPENDIX I
4 Q/ d) T! C2 N2 Y& h U# GSummary data for those samples of fish that were found by the Canadian Food Inspection Agency
4 h9 ?9 Y: X( d/ b+ F: N(unless otherwise noted) to contain, on average, approximately 0.2 ppm or less total mercury. r" @+ D, f: ^% n
Samples were collected at the importers= or at domestic processing plants during the periods April 1," o+ Q' _* u t) ~7 G! a6 M) _
2002 to March 31, 2003 and April 1, 2003 to October 7, 2004 (unless otherwise noted). A
% V4 A& e5 W+ P9 M7 {# {3 Wconcentration of zero indicates that mercury was not detected above the analytical detection limit.' I" E% K8 y' v# z* \
Total Mercury Concentration
1 X( H1 u7 l- I( ]& B4 J) L(ppm)6 Y8 V' ]) y6 U4 Z, f3 U; `
Species
. S( G5 J2 H, z; ~- tNo. of
" X6 E! ^( ~- s: Wsamples9 n& g3 i# G3 Y0 Y1 O) f; w6 _
(N) Mean Median Min Max Q! W$ v5 a$ k# Y0 {
Amberjacks 3 0.17 0.14 0.11 0.27
; @# m, L, x3 f/ C3 O* }Barracouta 1 0.06 0.06 0.06 0.06! n8 ^2 N5 c9 ~ p" o% r. c
Basa 5 0.02 0.02 0.02 0.02
: M. ]1 l, p" N2 ^Bullhead, Brown 2 0.09 0.09 0.07 0.1) f7 i, e: ]$ Y8 p3 y u$ ~1 R5 s
Capelin 4 0.02 0.02 0 0.05' e0 h/ b% q! z% v/ H; ~
Carp 1 0.1 0.1 0.1 0.1
7 H8 W7 y: _. \1 K" e: J/ {8 aCatfish (Channel or unspecified) 16 0.15 0.14 0.02 0.37
6 l, [* _( Y% @8 I5 l7 aChar, Arctic 5 0.09 0.10 0.05 0.05
3 o; h5 X( O b hClam (various species) 40 0.03 0.01 0 0.08
, i6 U: s: w/ W' s2 C, lCockle, Greenland 1 0.05 0.05 0.05 0.05' Q. `5 I5 ]/ K6 q R
Cod (Atlantic, Pacific or unspecified) 34 0.06 0.06 0 0.28; U' {7 L% u0 q
Crab (Dungeness, Rock, Snow) 19 0.09 0.07 0 0.37
& h7 F+ C" E5 }) ? ]) YCrawfish 1 0.1 0.1 0.1 0.1/ |4 T" `* A# I, T! L, P
Drum, Freshwater 2 0.22 0.22 0.03 0.4' W8 M% U% [) m" Y
Eel (American, Conger/sea, Spiny/spotted) 52 0.19 0.10 0 0.76
3 w* @; o, r$ s1 G# aEel (species not specified) 107 0.24 0.16 0.01 1.703 O, K* N! O5 T- l2 ~: I2 N
Flounder (various species) 22 0.06 0.06 0.03 0.12
5 v7 |: B( D4 m$ J* E; U* SHaddock 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
