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来源：百度知道 编辑：UC知道 时间：2024/05/24 09:36:46
题目：Methoddevelopmentfortheanalysisoforganophosphateandpyrethroid
insecticidesatlowpartspertrillionlevelsinwater

Pyrethroidsarestronglyadsorbedontosoilandsediment,which
leadstotherelativelylowconcentrationsofthesepesticidesin
surfacewater.Inaddition,toxicologicalstudiesperformedinwater-
onlysystemshavefoundthatthesepesticidescauselethaland
sublethaleffectsatextremelylowconcentrations,withLC50s
beinggenerallylessthan1ng/mL [14].Forexample,cyperme-
thrinhasLC50valuesof1.2,0.9and0.5ng/mLforbrowntrout,
carpandrainbowtrout,respectively [15].Whenmosquitoand
midgelarvaeweretested,24hLC50valuesfordeltamethrin,
cypermethrin,fenvalerateandpermethrinrangedfrom0.02to
13ng/mL [16].Deltamethrinandcypermethrinhave96hLC50s
ofabout0.01ng/mLinlobster(Homarusamericanus)andshrimp
(Crangonseptemspinosa) [17,18].Toxicitytotheamphipod Hyalella
azteca occursatconcentrationsaslowas0.002and0.005ng/mL
for-cyhalothrinandcypermeth

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Methoddevelopmentfortheanalysisoforganophosphateandpyrethroid
insecticidesatlowpartspertrillionlevelsinwater

Pyrethroidsarestronglyadsorbedontosoilandsediment， leadstotherelativelylowconcentrationsofthesepesticidesin surfacewater。Inaddition， toxicologicalstudiesperformedinwater- onlysystemshavefoundthatthesepesticidescauselethaland sublethaleffectsatextremelylowconcentrations， withLC50s
beinggenerallylessthan1ng/mL [14]。Forexample， cyperme- thrinhasLC50valuesof1.2， 0.9and0.5ng/mLforbrowntrout，
carpandrainbowtrout，分别[15]。Whenmosquitoand midgelarvaeweretested， 24hLC50valuesfordeltamethrin， cypermethrin， fenvalerateandpermethrinrangedfrom0.02to
13ng/mL [16]。Deltamethrinandcypermethrinhave96hLC50s ofabout0.01ng/mLinlobster (Homarusamericanus) andshrimp
(Crangonseptemspinosa) [17,18]。Toxicitytotheamphipod Hyalella
azteca occursatconcentrationsaslowas0.002and0.005ng/mL
for-cyhalothrinandcypermet