A method for the simultaneous quantification of lycopene, β-carotene, retinol and α-tocopherol by high-performance liquid chromatography (HPLC) with Vis/fluorescence detection with isocratic elution was optimized and validated. The method consists of a rapid and simple liquid-liquid extraction procedure and a posterior quantification of extracted supernatants by HPLC. Aliquots of plasma were stored at -20°C for...
Vitamin C, an exogenous antioxidant, is essential to human health. In this study, a method was validated to serum vitamin C quantification by HPLC-UV. Its stability with and without the use of tris [2-carboxy-ethyl] phosphine hydrochloride (TCEP), at -20 and -80 °C, in serum and supernatant were also evaluated. Analysis showed r² > 0.99, precision CV% < 15% and % bias < 15%, being linear, precise and accurat...
Este trabalho procurou ressaltar a importância de parâmetros laboratoriais como marcadores de risco no infarto agudo do miocárdio (IAM). O IAM é um dos maiores problemas de saúde pública no mundo, sendo que dois terços dos pacientes que buscam atendimento emergencial não têm causa cardíaca, não havendo necessidade de hospitalização. Concentrações de fibrinogênio medidas durante a fase aguda do IAM foram associa...