| monitoring programme on nitrates in vegetables and vegetable-based baby foods marketed in the region of valencia, spain: levels and estimated daily intake. | this study was carried out to determine the current levels of nitrates in vegetables and vegetable-based baby foods (a total of 1150 samples) marketed in the region of valencia, spain, over the period 2000-2008, and to estimate the toxicological risk associated with their intake. average (median) levels of nitrate in lettuce, iceberg-type lettuce and spinach (1156, 798 and 1410 mg kg(-1) w/w, respectively) were lower than the maximum limits established by european union legislation. thirteen fre ... | 2010 | 20234964 |