Determination of Elements in Energy Drinks by ICP OES with Minimal Sample Preparation

نویسندگان

  • Anna Szymczycha-Madeja
  • Maja Welna
  • Pawel Pohl
چکیده

Foram comparados vários procedimentos de preparo de amostras, isto é, decomposição total de uma mistura HNO3/H2O2 em placa de aquecimento, decomposição parcial por meio de solubilização em aqua regia e diluição com solução de HNO3 de baixa concentração, para determinação do conteúdo total de Ba, Ca, Cd, Cr, Cu, Fe, Mg, Mn, Ni, P, Pb, Sr e Zn em bebidas energéticas utilizando espectrometria de emissão ótica por plasma indutivamente acoplado (ICP OES). O critério foi o desempenho de cada método no que refere precisão, exatidão dos resultados e limites de detecção dos elementos obtidos por ICP OES. Os melhores resultados foram fornecidos pela diluição mais simples e fácil das amostras analisadas através de solução de HNO3 diluída, com limites de detecção dos elementos dentro de 0,08-42,0 ng mL -1, precisão de 0,5-3% e exatidão melhor que 5%. Seis amostras comerciais de bebidas energéticas foram analisadas com o procedimento proposto.

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تاریخ انتشار 2013