| concentration and potential health risk of heavy metals in market vegetables in chongqing, china. | concentration and daily intake (di) of heavy metals (pb, zn, mn, cu, cd and cr) in market vegetables in chongqing of china are investigated and their potential health risk for local consumers is simultaneously evaluated by calculating the target hazard quotient (thq). the results showed that the measured pb and cd concentrations exceeded the safety limits given by fao/who and chinese regulations, indicating serious contamination of market vegetables by these metals. as respective di values for p ... | 2011 | 21601282 |