2 documents found, page 1 of 1
Simultaneous quantification of lycopene, β-carotene, retinol and α -tocopherol ...
Charão,Mariele F.; Moro,Angela M.; Brucker,Natália; Bulcão,Rachel P.; Baierle,Marília; Freitas,Fernando; Durgante,Juliano; Nascimento,SabrinaA 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...
Determinação voltamétrica de metais em águas e fluidos biológicos empregando mi...
Carvalho,Leandro M. de; Spengler,Cristiane; Garmatz,Júlia C.; Nascimento,Paulo C. do; Bohrer,Denise; Del-Fabro,Luciana; Radis,GuilhermeThis work describes the optimization of pretreatment steps for the destruction of organic matter in samples of waters and biological fluids, by using an UV irradiation system with a high power UV radiation source (400 W). The efficiency of the system constructed for the photo-decomposition of samples of model waters, natural waters and biological fluids was investigated by performing recovery experiments of the...