Development of a Digestion Method for the Determination of Inorganic Contaminants in Polyvinyl Acetate (PVAc)

نویسندگان

  • Erika Matoso
  • Solange Cadore
چکیده

Neste trabalho estão descritos alguns métodos para a digestão de amostras de emulsão aquosa de acetato de polivinila visando à determinação de As, B, Cd, Cr, Cu, Fe, Hg, Ni, Pb e Sb por espectrometria de emissão óptica em plasma com acoplamento indutivo (ICP OES). Foram estudados métodos clássicos como calcinação, digestão ácida (a baixa temperatura e a alta temperatura) em chapa de aquecimento e também a digestão assistida por microondas (MW). Nas condições otimizadas (MW) obteve-se apenas 0,1% de conteúdo de carbono residual (RCC), recuperações das espécies estudadas entre 100 e 107 %, com RSD entre 0,5 e 2,5 % e limites de quantificação entre 0,003 e 0,29 mg kg

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تاریخ انتشار 2008