Investigation of a Novel Ag(III) Chemiluminescence System and its Mechanism for Determination of Uric Acid in Human Urine

نویسندگان

  • Li Ma
  • Lingmei Niu
  • Wei Wang
  • Weijun Kang
  • Hongmei Shi
چکیده

Um método simples e sensível baseado na análise de quimiluminescência por injeção em fluxo acoplado ao complexo luminol-Ag(III) foi desenvolvido para se determinar ácido úrico (UA) em urina humana. O método se baseia na reação de quimiluminescência (CL) do luminol com Ag(III) em solução alcalina, sendo que o UA da urina aumenta dramaticamente as intensidades CL. Em condições ótimas, a intensidade CL relativa aumentava linearmente com a concentração de UA, na faixa de 1.0 × 10 a 5.0 × 10 mol L com um limite de detecção de 2.0 × 10 mol L (3σ). O desvio padrão relativo (n = 11) era de 0.71% para 1.0 × 10 mol L UA. Os mecanismos de reação possíveis do sistema CL foram sugeridos com base nos espectros de absorção UV, espectros CL e no experimento de trapping de radicais livres feitos neste trabalho.

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تاریخ انتشار 2014