Research
Print page Print page
Switch language
The Capital Region of Denmark - a part of Copenhagen University Hospital
Published

Degradation of polyphenolic antioxidants in blueberry nectar aseptically filled in PET

Research output: Contribution to journalJournal articleResearchpeer-review

Harvard

APA

CBE

MLA

Vancouver

Author

Trošt, Kajetan ; Golc-Wondra, Alenka ; Prošek, Mirko. / Degradation of polyphenolic antioxidants in blueberry nectar aseptically filled in PET. In: Acta Chimica Slovenica. 2009 ; Vol. 56, No. 2. pp. 494-502.

Bibtex

@article{c235d24e7c494bc3b754cd64a34e4cea,
title = "Degradation of polyphenolic antioxidants in blueberry nectar aseptically filled in PET",
abstract = "One of the conservation processes for blueberry preservation is aseptic filling of blueberry nectar in PET packaging. As virgin PET exhibits a low oxygen barrier, oxygen scavengers can be added to multi-layer bottles that sandwich a barrier plastic between layers of PET or simply mixed with PET to add barrier properties. As polyphenolic antioxidants are known to positively influence human health, stability determination is crucial. This study shows changes in total polyp- henol concentrations and total and individual anthocyanin concentrations showing antioxidant activity. A stability scale for individual anthocyanins was made. Since oxygen can destroy the antioxidant ability of polyphenols, various methods of protecting against oxidation were used and characterized by a gradient HPLC-Vis technique. Total polyphenol analyses and antioxidant activity analyses were carried out using spectrophotometric measurements. During 9 months of blueberry nectar storage there was a 3-9.9% decrease in polyphenol concentrations and antioxidant activity decreased by 20.9-24.2%. The biggest drop was seen among anthocyanins, whose concentration decreased by 78-84% of total anthocyanins. Among the quantified anthocyanins, cyanidin 3-glucoside and cyanidin 3-galactoside were the most stable, while malvidin 3-arabinoside was the least stable. The packaging that offered the least protection was the virgin PET bottle without oxygen protection. Antioxidant activity analyses suggest that a three-layer multilayer bottle is the packaging that gives the best protection to the product.",
keywords = "Anthocyanins, Antioxidants, Barrier pet, Blueberry nectar, HPLC-VIS",
author = "Kajetan Tro{\v s}t and Alenka Golc-Wondra and Mirko Pro{\v s}ek",
year = "2009",
language = "English",
volume = "56",
pages = "494--502",
journal = "Acta Chimica Slovenica",
issn = "1318-0207",
publisher = "Slovensko Kemijsko Drustvo",
number = "2",

}

RIS

TY - JOUR

T1 - Degradation of polyphenolic antioxidants in blueberry nectar aseptically filled in PET

AU - Trošt, Kajetan

AU - Golc-Wondra, Alenka

AU - Prošek, Mirko

PY - 2009

Y1 - 2009

N2 - One of the conservation processes for blueberry preservation is aseptic filling of blueberry nectar in PET packaging. As virgin PET exhibits a low oxygen barrier, oxygen scavengers can be added to multi-layer bottles that sandwich a barrier plastic between layers of PET or simply mixed with PET to add barrier properties. As polyphenolic antioxidants are known to positively influence human health, stability determination is crucial. This study shows changes in total polyp- henol concentrations and total and individual anthocyanin concentrations showing antioxidant activity. A stability scale for individual anthocyanins was made. Since oxygen can destroy the antioxidant ability of polyphenols, various methods of protecting against oxidation were used and characterized by a gradient HPLC-Vis technique. Total polyphenol analyses and antioxidant activity analyses were carried out using spectrophotometric measurements. During 9 months of blueberry nectar storage there was a 3-9.9% decrease in polyphenol concentrations and antioxidant activity decreased by 20.9-24.2%. The biggest drop was seen among anthocyanins, whose concentration decreased by 78-84% of total anthocyanins. Among the quantified anthocyanins, cyanidin 3-glucoside and cyanidin 3-galactoside were the most stable, while malvidin 3-arabinoside was the least stable. The packaging that offered the least protection was the virgin PET bottle without oxygen protection. Antioxidant activity analyses suggest that a three-layer multilayer bottle is the packaging that gives the best protection to the product.

AB - One of the conservation processes for blueberry preservation is aseptic filling of blueberry nectar in PET packaging. As virgin PET exhibits a low oxygen barrier, oxygen scavengers can be added to multi-layer bottles that sandwich a barrier plastic between layers of PET or simply mixed with PET to add barrier properties. As polyphenolic antioxidants are known to positively influence human health, stability determination is crucial. This study shows changes in total polyp- henol concentrations and total and individual anthocyanin concentrations showing antioxidant activity. A stability scale for individual anthocyanins was made. Since oxygen can destroy the antioxidant ability of polyphenols, various methods of protecting against oxidation were used and characterized by a gradient HPLC-Vis technique. Total polyphenol analyses and antioxidant activity analyses were carried out using spectrophotometric measurements. During 9 months of blueberry nectar storage there was a 3-9.9% decrease in polyphenol concentrations and antioxidant activity decreased by 20.9-24.2%. The biggest drop was seen among anthocyanins, whose concentration decreased by 78-84% of total anthocyanins. Among the quantified anthocyanins, cyanidin 3-glucoside and cyanidin 3-galactoside were the most stable, while malvidin 3-arabinoside was the least stable. The packaging that offered the least protection was the virgin PET bottle without oxygen protection. Antioxidant activity analyses suggest that a three-layer multilayer bottle is the packaging that gives the best protection to the product.

KW - Anthocyanins

KW - Antioxidants

KW - Barrier pet

KW - Blueberry nectar

KW - HPLC-VIS

UR - http://www.scopus.com/inward/record.url?scp=67649880664&partnerID=8YFLogxK

M3 - Journal article

AN - SCOPUS:67649880664

VL - 56

SP - 494

EP - 502

JO - Acta Chimica Slovenica

JF - Acta Chimica Slovenica

SN - 1318-0207

IS - 2

ER -

ID: 52586648