Hydrophilic carboxylic acids and iridoid glycosides in the juice of American and European cranberries (Vaccinium macrocarpon and V. oxycoccos), lingonberries (V. vitis-idaea), and blueberries (V. myrtillus)

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Analysis of the hydrophilic fraction of cranberry juice by reversed-phase HPLC using an Aqua LUNA column with diode array or MS detection revealed the presence of quinic acid, malic acid, shikimic acid, and citric acid. For the first time, two iridoid glucosides were found in the juice. The two iridoid glucosides were shown to be monotropein and 6,7-dihydromonotropein by MS and NMR spectroscopy. A fast reversed-phase HPLC method for quantification of the hydrophilic carboxylic acids was developed and used for analyses of cranberry, lingonberry, and blueberry juices. The level of hydrophilic carboxylic acids in cranberries was 2.67-3.57% (w/v), in lingonberries 2.27-3.05%, and in blueberries 0.35-0.75%. In lingonberries both iridoid glucosides were present, whereas only monotropein was present in blueberries.
Original languageEnglish
JournalJournal of Agricultural and Food Chemistry
Issue number23
Pages (from-to)6871-4
Number of pages3
Publication statusPublished - 2002

Bibliographical note

Keywords: Beverages; Carboxylic Acids; Chromatography, High Pressure Liquid; Citric Acid; Iridoids; Magnetic Resonance Spectroscopy; Malates; Mass Spectrometry; Quinic Acid; Shikimic Acid; Vaccinium macrocarpon; Vaccinium myrtillus; Vaccinium vitis-idaea

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