苏南某市春季蔬菜中农药残留调查

Residues of pesticides in spring vegetables in southern Jiangsu,China

2003年3月对苏南某市蔬菜中有机氯、拟除虫菊酯及氨基甲酸酯类农药残留状况的调查结果表明:有机氯农药残留量较低,检出范围为ND～31.7μg·kg-1,蔬菜基地蔬菜中六六六类农药检出量高于传统菜地;蔬菜中滴滴涕类残留物主要组分为p,p′ DDE和p,p′ DDD。拟除虫菊酯类农药检出范围为ND～46.9μg·kg-1,检出量较高的是氯氰菊酯、氰戊菊酯、溴氰菊酯。氨基甲酸酯类农药检出范围为ND～111.9μg·kg-1,其中灭虫威和3-羟基克百威检出量和检出率最高,且蔬菜基地样品中的检出量低于传统菜地。蔬菜样品中克百威大部分已降解为3-羟基克百威,涕灭威、亚砜涕灭威与砜涕灭威检出量都很低,其中砜涕灭威平均检出量最低。供试区春季蔬菜中所检测的各种农药除克百威和涕灭威外,其余残留量均低于国家无公害蔬菜农药残留量标准。

Analysis of residues of pesticides in vegetables in southern Jiangsu was conducted in March of 2003. Results indicate that the residues of organochlorine pesticides(OCPs)ranged from not detected(ND)to 31.7(μg·kg^(-1)).The residues of HCHs in the samples from vegetable production bases were higher than those in the samples from traditional vegetable fields.Most of DDT has been resolved into p,p′-DDE and p,p′-DDD.The residues of pyrethroid ranged between ND and 46.9(μg·kg^(-1)).Cypermethrin,fenvalerate and deltamethrin were found to be quite higher than others in the form of residue in vegetables.The residues of carbamate ranged from ND to 111.9(μg·kg^(-1)).The residues of methiocarb and 3-hydroxycarbofuran were widely detected and quite high in concentration,which were much higher in the samples from traditional vegetable fields than from vegetable production bases.The detection rate of aldicarb sulfone was lower than those of aldicarb and aldicarb sulfoxide.The residues of all the pesticides except aldicarb and carbofuran were far below the related national hygiene standard for hazard-free vegetables.