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Hillebrand S.,TU Braunschweig | Husing B.,Fakultat Agrarwissenschaften und Landschaftsarchitektur der Fachhochschule Osnabruck | Storck H.,TU Braunschweig | Tiemann I.,Fakultat Agrarwissenschaften und Landschaftsarchitektur der Fachhochschule Osnabruck | And 5 more authors.
Deutsche Lebensmittel-Rundschau | Year: 2010

Total polyphenols, monomeric anthocyanins, chlorogenic acids, and anthocyanin composition were evaluated in eight different red- and bluefleshed potato varieties by means of photometric, high-performance liquid chromatographic, as well as mass spectrometric techniques. The radical scavenging activity of pigmented potato extracts was analyzed using the TEAC assay. Total polyphenols ranged from 75 to 208 mg gallic acid equivalent (GAE)/100 g fresh weight (FW). For the contents of monomeric anthocyanins and chlorogenic acids values between 13.0 to 113.1 mg/100 g FW and 14.8 to 66.4 mg/100 g FW have been determined. The antioxidant activity varied from 325 to 1095 umol trolox equivalents (TE)/100 g FW. A comparison of the cultivars showed significant differences in anthocyanin composition. It was found that redfleshed potatoes predominantly contain pelargonidin derivatives and the , major pigment was identified as pelargonidin-3-p-coumaroylrutinoside-5-glucoside while the blue potato varieties show a complex composition of several acylated anthocyanins. The main pigments of blue-fleshed potato cultivars were determined by HPLC-ESI-MSn as 3-coumaroylrutinoside5-glucosides of petunidin, malvidin, and peonidin, respectively. Source

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