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ARTICLE INFO Keywords: Food contamination, sweet corn, nickel, chromium, lead, mercury, INTRODUCTION Sweet corn ( Zea mays amylacea saccharata ) is one of the oldest foods in the world, about 5,000 years old. It comes from the American continent and was imported by discoverers of America to Europe. First of all corn was grown in Spain. At the end of the 15th century became the cultivation of corn significant development. Since the beginning of the 16th century it began to expand throughout Europe (Gay, 1984) . In terms of the world's economy can be corn considered as the most important feed material and human nutrition (Jurasek, 1997). The fruit of corn is a grain or achene from the botanical point of view. It may be a variety of shapes and colors. Endosperm consists of 80 - 84% of grain weight and contains starch (Rysava et al. , 2004). The corn provides an important raw material for the processing industry, especially for food, construction, chemicals and pharmaceuticals (Pospisil, 2002). The corn is very beneficial for health due to its composition. The main component of grain corn is starch (60 - 70%). Corn also contains proteins in an average 10 %, vitamin A, E, B and also vitamin C, D and K in trace amounts. Heavy metals from natural and anthropogenic sources have harmful effects on soil, reduce nutritional, technological and sensory value of the plant and affects the health of animals and people. The sources of heavy metals are transport, industry as well as agriculture. Soil is a fundamental component of environment. The importance of care and preservation of safe and hygienic land that produces food and feed is enhanced by its difference from the other components of the environment

The evaluation of nickel, chromium, lead and mercury content in sweet corn