title: The colour degradation of anthocyanin-rich extract from butterfly pea (Clitoria ternatea L.) petal in various solvents at pH 7.
abstract: A spectroscopic study was conducted to evaluate the colour degradation mechanism of anthocyanin-rich extract from butterfly pea petal. The extract was diluted in four different solvent systems, which were buffer solution pH 7 (AQ7) and the mixture of organic solvent with buffer solution pH 7 (4:1 v/v). The organic cosolvent involved were methanol (ME7), ethanol (ET7) and acetone (AC7). The samples were stored in containers with 0% and 50% headspace, and their colour intensity, total anthocyanin and hypsochromic shift were evaluated periodically. The rank of colour and anthocyanin degradation from the biggest was AQ7 > ME7 > ET7 > AC7. The longest hypsochromic shift was AQ7 > ME7 > ET7, while in AC7 the shift was absent. There was evidence that the volume of package headspace provoked colour stability. The colour degradation in AC7 was proposed to occur through hydrophobic interaction unfolding, and in AQ7 was through the deacylation, while in ME7 and ET7 was due to both mechanisms.
authors.affiliation: a Department of Food Science and Technology , Bogor Agricultural University , Bogor , Indonesia.|b Food Technology Department , Swiss German University EduTown BSD City , Tangerang , Indonesia.
authors.forename: Abdullah Muzi
authors.initials: AM
authors.lastname: Marpaung
authors.affiliation: a Department of Food Science and Technology , Bogor Agricultural University , Bogor , Indonesia.|c Southeast Asian Food and Agricultural Science and Technology (SEAFAST) Center , Bogor Agricultural University , Bogor , Indonesia.
authors.forename: Nuri
authors.initials: N
authors.lastname: Andarwulan
authors.affiliation: a Department of Food Science and Technology , Bogor Agricultural University , Bogor , Indonesia.|c Southeast Asian Food and Agricultural Science and Technology (SEAFAST) Center , Bogor Agricultural University , Bogor , Indonesia.
authors.forename: Purwiyatno
authors.initials: P
authors.lastname: Hariyadi
authors.affiliation: a Department of Food Science and Technology , Bogor Agricultural University , Bogor , Indonesia.|c Southeast Asian Food and Agricultural Science and Technology (SEAFAST) Center , Bogor Agricultural University , Bogor , Indonesia.
authors.forename: Didah
authors.initials: D
authors.lastname: Nur Faridah
mesh_terms: D000215:Acylation; D000872:Anthocyanins / Q000737:chemistry*; D031292:Clitoria / Q000737:chemistry*; D003116:Color; D035264:Flowers / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D057927:Hydrophobic and Hydrophilic Interactions; D010860:Pigments, Biological / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry; D012997:Solvents; D013057:Spectrum Analysis
chemical_list: D000872:Anthocyanins; D010860:Pigments, Biological; D010936:Plant Extracts; D012997:Solvents
keywords: Butterfly pea; anthocyanin; deacylation; hydrophobic interaction; hypsochromic shift