Determination of Copper in Human Hair and Tea Samples after Dispersive Liquid‐Liquid Microextraction Based on Solidification of Floating Organic Drop (DLLME‐SFO)

نویسندگان

  • Soleiman Bahar
  • Razieh Zakerian
چکیده

Um método simples de microextração líquido-líquido dispersiva com solidificação da gota orgânica flutuante (DLLME-SFO), prévio à espectrometria de absorção atômica em chama, foi usado com sucesso na separação e pré-concentração de cobre em amostras de cabelo humano e chá. O método proposto é simples, barato e altamente preciso. Neste estudo, a otimização de parâmetros experimentais que influenciam a extração, como tipo e volume dos solventes de extração e do dispersor, pH, quantidade de agente quelante e tempo de extração foi realizada normalmente usando uma abordagem passo-a-passo, na qual cada fator variou sequencialmente. O efeito dos íons interferentes na recuperação dos analitos também foi investigado. O gráfico de calibração foi linear no intervalo de 5-200 ng mL, com limite de detecção de 3,4 ng mL. O desvio padrão relativo (RSD) foi 0,7% (n = 10, C = 2 ng mL) e o fator de enriquecimento, 28.

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تاریخ انتشار 2012