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Liquid-liquid extraction combined with high performance liquid chromatography-d...
Sanson, Ananda Lima; Silva, Suéllen Cristina Rennó; Martins, Matheus Coutinho Gonçalves; Giusti-Paiva, Alexandre; Maia, Patrícia PenidoA liquid-liquid extraction (LLE) combined with high-performance liquid chromatography-diode array detection method for simultaneous analysis of four chemically and structurally different antineoplastic drugs (cyclophosphamide, doxorubicin, 5-fluorouracil and ifosfamide) was developed. The assay was performed by isocratic elution, with a C18 column (5 µm, 250 x 4.6 mm) and mobile phase constituted by water pH 4....
Single gas chromatography method with nitrogen phosphorus detector for urinary ...
Malafatti, Lusiane; Maia, Patrícia Penido; Martins, Matheus Coutinho Gonçalves; Siqueira, Maria Elisa Pereira Bastos de; Martins, IsaritaNicotine is a major addictive compound in cigarettes and is rapidly and extensively metabolized to several metabolites in humans, including urinary cotinine, considered a biomarker due to its high concentration compared to other metabolites. The aim of this study was to develop a single method for determination of urinary cotinine, in active and passive smokers, by gas chromatography with a nitrogen phosphorus ...