title: Optimisation of the microwave-assisted extraction of pigments from paprika (Capsicum annuum L.) powders.
abstract: The efficiency of microwave-assisted extraction (MAE) for the extraction of colour pigments from paprika (Capsicum annuum) powders was evaluated using 30 extracting solvent mixtures. The separation efficacy and selectivity of MAE was carried out using a spectral mapping technique and the relationship between the efficacy and selectivity of extraction and the physicochemical parameters of solvent mixtures was calculated by stepwise regression analysis. The calculation results were verified experimentally by the separation of pigment fractions by high-performance liquid chromatography. It was established that both the efficacy and selectivity of MAE depend significantly on the dielectric constant of the extraction solvent mixture.
authors.affiliation: lnstitute of Chemistry, Chemical Research Centre, Hungarian Academy of Sciences, Budapest. forgacs@cric.chemres.hu
authors.forename: G A
authors.initials: GA
authors.lastname: Csiktusnádi Kiss
authors.forename: E
authors.initials: E
authors.lastname: Forgács
authors.forename: T
authors.initials: T
authors.lastname: Cserháti
authors.forename: T
authors.initials: T
authors.lastname: Mota
authors.forename: H
authors.initials: H
authors.lastname: Morais
authors.forename: A
authors.initials: A
authors.lastname: Ramos
mesh_terms: D002212:Capsicum / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D005504:Food Analysis; D008872:Microwaves; D015999:Multivariate Analysis; D010860:Pigments, Biological / Q000032:analysis / Q000302:isolation & purification*; D010936:Plant Extracts / Q000737:chemistry; D010946:Plants, Medicinal; D011208:Powders / Q000737:chemistry; D012997:Solvents / Q000737:chemistry
chemical_list: D010860:Pigments, Biological; D010936:Plant Extracts; D011208:Powders; D012997:Solvents