Concentração de vanádio nas misturas de sal mineral utilizadas na suplementação de bovinos
Resumo
O comércio de suplementos minerais para bovinos no Brasil cresceu muito desde a última década. Muito embora seja necessária a utilização de matérias primas sem contaminantes, é possivel que alguns fabricantes ainda utilizem fontes de fósforo mais baratas. Essa situação pode veicular metais pesados na mistura mineral pronta, o que, em médio prazo, pode intoxicar os animais. Por essa razão, foi mensurada a concentração de Vanádio nas amostras de misturas de sal mineral usadas na suplementação de gado de corte nos estados do Paraná, Brasil. A concentração de vanádio foi determinada pela indução da espectrometria acoplada à emissão de plasma atômico. Das 22 amostras analisadas, 17 tinham valores maiores que 50 ppm (variando entre 66 e 128 ppm), a concentração máxima recomendada pelo Conselho Nacional de Pesquisa e pela Associação Americana de Controle Oficial de Alimentação. Esses resultados mostram a necessidade de um monitoramento industrial cuidadoso, porque algumas misturas de minerais contém quantidade suficiente de vanádio para causar intoxicação nos animais.
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Referências
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