知识与财富的链接
为了探讨有机氯农药对缢蛏的食用安全性影响,2010年在宁波近岸海域采集了11个缢蛏样品用气相色谱法测定其持久性有机氯农药(8种)的残留量,采用接触风险指数法及致癌风险指数法进行了风险评估以及安全消费量的估算.由于我国《食品中农药最大残留限量标准》和《海洋生物质量》中只对HCHs和DDTs总量进行限值,未对各分量进行具体限值,采用澳大利亚食品卫生标准值对部分单体进行评价.结果显示:缢蛏中α-HCH、β-HCH、γ-HCH、pp'-DDE、pp'-DDD、pp'-DDT的残留量均低于澳大利亚食品安全限量,HCHs和DDTs残留量符合我国《海洋生物质量》一类标准;致癌风险指数CRI在1.61×10-5~9.98×10-5;接触风险指数ERI在0.00~2.55×10-2;每天每千克人体食用缢蛏可接受的最高致癌安全消费量(按CRI≤10-4估算)平均为0.044 kg/(kg·d);每人每千克体重可接受的最高接触安全消费量(按ERI≤1估算)平均为0.502 kg/(kg·d).消费者在正常情况下食用宁波近岸海域的缢蛏而受到有机氯农药危害的可能性不大.
In onder to study the effect of organic chlorine pesticides contaminaion of the razor clam,sinonoraculaconstricta,for food safety,1l samplesfrom different sites were collected along the coast of Ningbo in 2010,and thecontents of organic chlorinated pesticides consisting of 8 monomers were detected by a gas chromatography with e-lectron capture detector.The exposure risk index and carcinogenic risk index are used for the risk assessment andthe safety consumption.Asthe maximum residue limits for pesticides and marine biological qualty only limted thetotal value of HCHs and DDTs,which didnt limit the monomer value of HCHs and DDTs in China''s regulation,thisreport used Australia food standard code for the monomer value evaluation of HCHs and DDTs.The results showedthat the residues of αHCH,β-HCH,γHCH,pp''-DDE,pp''-DDD,pp''-DDT are below the limit quantity of foodsanitation of Australia and the total value of HCHs and DDTs meet with the first class of Marine Biological Qualityof China.The carcinogenic risk index(CRI)is 1.61×10-⁵~9.98×10-⁵,and the exposure risk index(ERI)is0.00~2.55×10-².It is suggested that the safe consumption of the edble part of the clam by one kilogram bodyweight per person each day is averaged 0.044kg according to acceptable cacinogenic risk ndex(CRI≤1×10-4),or 0.502 kg according to acceptable exposure risk index(ERI≤1).The harm of organic chlorine pesti-cides for consumers who usethe clam from coastal Ningbo is a minimal probability.
