TY - JOUR
T1 - Cranberries versus lingonberries: A challenging authentication of similar Vaccinium fruit
AU - Hurkova, Kamila
AU - Uttl, Leos
AU - Rubert, Josep
AU - Navratilova, Klara
AU - Kocourek, Vladimir
AU - Stranska-Zachariasova, Milena
AU - Paprstein, Frantisek
AU - Hajslova, Jana
PY - 2019/6/30
Y1 - 2019/6/30
N2 - 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).
AB - 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).
KW - Cranberries
KW - Drying
KW - Food authenticity
KW - High-resolution mass spectrometry
KW - Lingonberries
KW - Untargeted metabolomics
KW - Vaccinium berries
U2 - 10.1016/j.foodchem.2019.01.014
DO - 10.1016/j.foodchem.2019.01.014
M3 - Article
C2 - 30744842
AN - SCOPUS:85060943374
SN - 0308-8146
VL - 284
SP - 162
EP - 170
JO - Food Chemistry
JF - Food Chemistry
ER -
