Lead, cadmium, mercury and insecticide residue control of fresh vegetables.

Comparative investigations were carried out for heavy metals and heptenophos the sole used insecticide in used water, soil samples and harvest vegetables of a fresh cultivation region and of supplies of large plants. If one compares the recommended levels given with the levels found in the different types of vegetables investigated (cucumber, green pepper, tomatoes) then the values found lie far below the recommended levels.