DETERMINAÇÃO DE METAIS EM LEITE in natura PROVENIENTE DE VACAS CRIADAS NO SISTEMA SEMI- EXTENSIVO DO ALTO DA BACIA DO RIO PARANÁ EM GOIÁS, BRASIL CENTRAL

Abstract

Most of the milk production of Goiás is from the family farm, which over the years has been losing its physical space for the large areas of soybean and sugar cane. These monocultures are much technicality and major polluters of the environment due to the use of a large volume of agricultural insumpos, which contain various chemicals, including toxic metals, highly polluting and harmful to the biota and public health. The presence of metallic elements in foods of animal origin are dependent on natural conditions, the chemical composition of agricultural inputs used in production systems, animal or plant and environmental pollution. So can vary or not from one region to another, requiring a strict control over the presence of toxic metals in foods. The cadmium (Cd), lead (Pb) and zinc (Zn) in fresh milk from cows reared in semiextensive system in the family farming properties were determined by atomic absorption spectrometry method calls (AAS-Flame). The fresh milk samples were collected on 27 family farms located properties in south Goiás Statistical analysis showed no significant difference (p> 0.05) between the regions sampled. The aim of this study was to determine the levels of Cd, Pb and Zn, present in fresh milk from cows raised by family farmers in semi-extensive system in the municipalities of Piracanjuba, Morrinhos, Itumbiara and Goiatuba, top of the Paraná River Basin, south of Goias.