Contamination of Foods Boiled in Containers of Different Materials

The data presented in this communication deals with the contamination of milk and tomatoes juice, that are a daily consumed by a broad spectrum of Egyptian population when boiled in different types of utensils namely, glass, tin old and new aluminum, pottery, tefal, and stainless steel with heavy metals. The elements determined were sodium, calcium, potassium, iron, manganese, zinc, strontium, cobalt, cadmium, mercury, tin, rubidium, ytterbium and antimony. The technique used for the simultaneous determination of these elements was the instrumental neutron activation analysis. In the light of the obtained results, it was suggested that glass utensils are preferred for boiling milk on the others types of utensils. Also it was found that there is no danger when milk is boiled in other types of utensils since the concentration of both essential and hazardous metals were in the tolerable range. In case of boiling tomatoes juice in the aforementioned types of utensils, it was found that there was no distinct difference between the elemental content in the samples boiled in those types of utensils, thus it can be deduced that all these types of utensils can be used safety for boiling or cooking tomatoes juice