title: Separation and quantitation of colour pigments of chili powder (Capsicum frutescens) by high-performance liquid chromatography-diode array detection.
abstract: The performance of reversed-phase thin-layer (RP-TLC) and reversed-phase high-performance liquid chromatography (RP-HPLC) was compared for the separation and determination of the colour pigments of chili (Capsicum frutescens) powder using a wide variety of eluent systems. No separation of pigments was achieved in RP-TLC, however, it was established that tetrahydrofuran shows an unusually high solvent strength. RP-HPLC using water-methanol-acetonitrile gradient elution separated the chili pigments in many fractions. Diode array detection (DAD) indicated that yellow pigments are eluted earlier than the red ones and chili powder contains more yellow pigments than common paprika powders. It was established that the very different absorption spectra of pigments make the use of DAD necessary.
authors.affiliation: Institute of Chemistry, Chemical Research Centre, Hungarian Academy of Sciences, Budapest.
authors.forename: T
authors.initials: T
authors.lastname: Cserháti
authors.forename: E
authors.initials: E
authors.lastname: Forgács
authors.forename: M H
authors.initials: MH
authors.lastname: Morais
authors.forename: T
authors.initials: T
authors.lastname: Mota
authors.forename: A
authors.initials: A
authors.lastname: Ramos
mesh_terms: D002212:Capsicum / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D010860:Pigments, Biological / Q000032:analysis / Q000302:isolation & purification*; D010946:Plants, Medicinal; D015203:Reproducibility of Results; D013056:Spectrophotometry, Ultraviolet
chemical_list: D010860:Pigments, Biological