Cranberries versus lingonberries: A challenging authentication of similar Vaccinium fruit

•Metabolomic fingerprinting was employed for berries classification.•Biomarkers differentiating lingonberries and cranberries were identified.•The addition of cranberries to lingonberries can be discovered down to 1% (w/w).•Influence of drying process on berries metabolome was assessed. Due to uniqu...

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Bibliographic Details
Published in:Food chemistry 2019-06, Vol.284, p.162-170
Main Authors: Hurkova, Kamila, Uttl, Leos, Rubert, Josep, Navratilova, Klara, Kocourek, Vladimir, Stranska-Zachariasova, Milena, Paprstein, Frantisek, Hajslova, Jana
Format: Article
Language:English
Subjects:
Biomarkers - analysis
Chromatography, High Pressure Liquid
Cranberries
Drying
Flavonoids - analysis
Food Analysis - methods
Food Analysis - statistics & numerical data
Food authenticity
Food Contamination
Glucosides - analysis
High-resolution mass spectrometry
Lingonberries
Metabolomics - methods
Models, Statistical
Phospholipids - analysis
Phytochemicals - analysis
Plant Extracts - analysis
Polyphenols - analysis
Tandem Mass Spectrometry
Untargeted metabolomics
Vaccinium berries
Vaccinium macrocarpon - chemistry
Vaccinium macrocarpon - metabolism
Vaccinium vitis-idaea - chemistry
Vaccinium vitis-idaea - metabolism
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Summary:•Metabolomic fingerprinting was employed for berries classification.•Biomarkers differentiating lingonberries and cranberries were identified.•The addition of cranberries to lingonberries can be discovered down to 1% (w/w).•Influence of drying process on berries metabolome was assessed. Due to unique phytochemicals contained, Vaccinum berries are known to have a number of positive health effects. In this context, lingonberries (Vaccinium vitis-idaea) are considered to be the most effective, thus finding many uses. Recently, fraud suspicion on lingonberries-based products has been reported, partial or even total replacement by less valued cranberries (Vaccinium macrocarpon) was found. In this study, metabolomic fingerprinting employing instrumental platform consisting of U-HPLC-HRMS/MS was investigated for discrimination between the two Vaccinum berries species. Methanolic extracts of 33 authentic samples from two harvest years were analyzed and chemometric evaluation was performed to identify significant marker compounds, their stability during drying process was assessed, too. The characteristic markers most contributing to berries classification were representatives of polyphenols and phospholipids. Peonidin 3-O-arabinoside and myricetin 3-O-glucoside, not occurring in lingonberries, enabled to discover the presence of cranberries in prepared admixtures down to 1% (w/w).
ISSN:0308-8146
1873-7072
DOI:10.1016/j.foodchem.2019.01.014