Tips & Warnings. Steam the tamales in a specified steamer basket. If you have a steamer pot or basket that does not use a stove top for heating, you will need to pour boiling water into the base of the pot and cover with a lid for 1 to 2 hours. Make reference to the instruction manual provided for your particular model to verify.
Arsenic is a trace element that occurs naturally in very small amounts in the diet. Its exact functions are not known. The estimated adult daily intake of arsenic from a typical diet is 12-50 mcg. A dietary requirement of 12-25 mcg/day has been suggested.
2.1 Arsenic is found in the natural environment in some abundance in the Earthâs crust and in small quantities in rock, soil, water and air. It is present in many different minerals. About one third of the arsenic in the atmosphere comes from natural sources, such as volcanoes, and the rest comes from man-made sources.ontext-Arsenic is a poisonous substance, which is released both from certain human activities and naturally from the Earth's crust. Humans may be exposed to arsenic mainly through food and water, particularly in certain areas where the groundwater is in contact with arsenic-containing minerals.