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Determination of theobromine, theophylline and caffeine in cocoa samples by a high-performance liquid chromatographic method with on-line sample cleanup in a switching-column system
ArticleAbstract: A simple reversed-phase high-performance liquid chromatographic method was developed for the determiPalabras claves:caffeine, COCOA, Column-switching, HPLC, Solid-phase extraction, Theobromine, TheophyllineAutores:Brunetto R., Delgado Y., Gómez A., Gutiérrez L., Maximo Gallignani, Ramos G., Romero C., Zambrano A.Fuentes:googlescopusHeadspace gas chromatography-mass spectrometry determination of alkylpyrazines in cocoa liquor samples
ArticleAbstract: This paper proposes a fast, accurate, and quantitative method for alkylpyrazines determination in coPalabras claves:Alkylpyrazines, COCOA, Gas chromatography, headspace, Maillard reaction products, Mass spectrometer detectionAutores:Brunetto R., Cayama Y.D., Gómez A., Gutiérrez L., Maximo Gallignani, Méndez Y.C., Ramos G., Roa S.C., Zambrano A.Fuentes:googlescopusHigh-performance liquid chromatographic determination of cocaine and benzoylecgonine by direct injection of human blood plasma sample into an alkyl-diol-silica (ADS) precolumn
ArticleAbstract: A column-switching high-performance liquid chromatographic method with UV detection for the determinPalabras claves:Alkyl-diol-silica column, Benzoylecgonine, Cocaine, Column switching, Human blood plasma samples, Restricted-access materialsAutores:Brunetto R., Burguera M., Delgado Y., Gutiérrez L., Luis Burguera J., Maximo GallignaniFuentes:googlescopus