Evaluation of Turbidimetric and Nephelometric Techniques for Analytical Determination of N-Acetylcysteine and Thiamine in Pharmaceutical Formulations Employing a Lab-Made Portable Microcontrolled Turbidimeter and Nephelometer

نویسندگان

  • Vagner B. dos Santos
  • Thiago B. Guerreiro
  • Willian T. Suarez
  • Ronaldo C. Faria
چکیده

A análise turbidimétrica e nefelométrica sequencial (STN) para duas aplicações analíticas empregando um nefelômetro e turbidímetro microcontrolado portátil (PMTN) é proposta. O PMTN é constituído de diodos emissores de luz, fotodiodos, microcontrolador como unidade de processamento central (CPU) e um um LCD (liquid crystal display) como amostrador. Os métodos STN foram aplicados para a determinação de N-acetilcisteína em formulações farmacêuticas nos intervalos de concentração de 8,0 × 10 a 5,0 × 10 mol L (nefelometria) e de 5,0 × 10 a 1,2 × 10 mol L (turbidimetria) com limites de detecção (LOD) de 2.6 × 10 e 7,5 × 10 mol L, respectivamente. As análises STN também foram executadas para a determinação de tiamina na faixa de concentração de 5,0 × 10 a 2,5 × 10 mol L e de 5,0 × 10 a 1,0 × 10 mol L com LOD de 5,91 × 10 e 3,11 × 10 mol L respectivamente no modo nefelométrico e turbidimétrico.

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تاریخ انتشار 2011