临沂地区蔬菜主要有害物质的调查

An investigation on harmful substances in vegetables in Linyiprefecture.

通过对全区蔬菜地布点取样调查，探明了蔬菜中有害物质（硝酸盐、亚硝酸盐、重金属、六六六、ＤＤＴ）以及６种重金属的残留量。结果表明，硝酸盐类是该区蔬菜中的主要有害物质，所检测的３种蔬菜中，硝酸盐和亚硝酸盐的超标率分别为７８．３％和３３．６％；重金属含量大多数未超标；ＤＤＴ全部未检出；六六六超标率平均为４．３％。

The residues of tbe main harmful substancessuch as nitrate, nitrite,666,DDT and six heavy metals in veg-etables at selected spots in Linyi prefecture have been detect-ed. The results show: nitrates are the main harmful sub-stances. Among the three vegetables detected,the rate of ni-trate and nitrite exceeding standard are 78.3%and 33.6%separately.Most of the contents of heavy metals in the vegeta-bles are below the sanitary standards. DDT are not detectedand the average rate of 666 exceeding standard is 4.3%.