title: Quantification of main bioactive metabolites from saffron (Crocus sativus) stigmas by a micellar electrokinetic chromatographic (MEKC) method.
abstract: Saffron is an expensive spice, cultivated in many regions of the world. Its chief metabolites include crocins, which are responsible for the coloring ability, safranal, which is the main essential oil constituent, and picrocrocin which is the main bitter constituent of the spice. A simple micellar capillary electrochromatographic (MEKC) method capable of quantifying all three types of main constituents was established. The pH, sodium dodecyl sulphate (SDS) content and electrolyte concentration of the background electrolyte was optimized. A simple extraction protocol was developed which can extract all metabolites of different polarity from the saffron stigmas. Optimal background electrolyte composed of 20 mM disodium phosphate, 5mM sodium tetraborate, 100 mM SDS, pH was set 9.5. Optimal extracting solvent was the background electrolyte, incubated with the sample for 60 min. The proposed method allows quantification of picrocrocin, safranal, crocetin- Di-(β-D-gentiobiosyl) ester and crocetin (β-D-glycosyl)-(β-D-gentiobiosyl) ester within 17.5 min, with limit of detection values ranging from 0.006 to 0.04 mg/ml, from a single stigma.
authors.affiliation: University of Debrecen, Department of Botany, Division of Pharmacognosy, H-4010 Debrecen, Egyetem tér 1, Hungary.
authors.forename: Sándor
authors.initials: S
authors.lastname: Gonda
authors.forename: Péter
authors.initials: P
authors.lastname: Parizsa
authors.forename: Gyula
authors.initials: G
authors.lastname: Surányi
authors.forename: Gyöngyi
authors.initials: G
authors.lastname: Gyémánt
authors.forename: Gábor
authors.initials: G
authors.lastname: Vasas
mesh_terms: D002338:Carotenoids / Q000032:analysis / Q000302:isolation & purification; D020374:Chromatography, Micellar Electrokinetic Capillary / Q000379:methods*; D027622:Crocus / Q000737:chemistry* / Q000378:metabolism; D053138:Cyclohexenes / Q000032:analysis / Q000302:isolation & purification; D004573:Electrolytes / Q000737:chemistry; D005960:Glucosides / Q000032:analysis / Q000302:isolation & purification; D006863:Hydrogen-Ion Concentration; D057230:Limit of Detection; D008823:Micelles; D010936:Plant Extracts / Q000032:analysis* / Q000737:chemistry; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D013729:Terpenes / Q000032:analysis / Q000302:isolation & purification
chemical_list: D053138:Cyclohexenes; D004573:Electrolytes; D005960:Glucosides; D008823:Micelles; D010936:Plant Extracts; D012997:Solvents; D013729:Terpenes; D002338:Carotenoids; D012967:Sodium Dodecyl Sulfate; C087963:safranal; C029036:crocin; C087962:picrocrocin