Assessment of Heavy Metal Pollution of Vegetables in Chongqing Market

Overall 204 vegetables samples from 17 kinds of vegetables were collected randomly from Chongqing market,Zn,As and Hg were measured from these samples.These heavy metals values were evaluated subsequently according to national hygiene standard methods.The results indicate that 60.8% of samples were in fairly better condition,while 15.7% of samples were slightly contaminated in terms of heavy metal level.Moreover,the results de-monstrate that As level in all samples attained the safety requirement,Zn in most samples met requirements,however,Hg level in most samples didn't comply with standards.As for the vegetable plantation location,vegetables from Beibei District were better than those from Yuzhong District and Nanan District.The adorptive capability for heavy meatals varied enormously,as for Zn,leaf vegetables fruit vegetables rhizoma vegetables,while concerning with As,leaf vegetables rhizoma vegetables fruit vegetables,in terms of Hg,rhizoma vegetables fruit rhizoma vegetables leaf vegetables.