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The impact of high pressure processing on the phenolic profile, hydrophilic antioxidant and reducing capacity of purée obtained from commercial tomato varieties

Jeż, Maja, Wiczkowski, Wiesław, Zielińska, Danuta, Białobrzewski, Ireneusz, Błaszczak, Wioletta
Food chemistry 2018 v.261 pp. 201-209
antioxidant activity, antioxidants, epicatechin, ferulic acid, high pressure treatment, hydrophilicity, naringenin, nutritive value, p-coumaric acid, polyphenols, rutin, spectrometers, tandem mass spectrometry, tomatoes
The effect of high hydrostatic pressure (HHP) (450–550–650 MPa/5–10–15 min) on polyphenols profile of purée obtained from commercial tomato varieties (Maliniak, Cerise, Black Prince and Lima) was investigated. Individual polyphenols, total phenolic index (TPI) were quantified using a mass spectrometer (HPLC-MS/MS). Photochemiluminescence (PCLACW), cyclic voltammetry (CV) and ferric reducing antioxidant power (FRAP) assays were used to determine the antioxidant capacity of the hydrophilic extract. The results demonstrated that at certain processing conditions, HHP may enhance or decrease the nutritional quality of tomato purée. However, the tomato variety was a key factor influencing the polyphenols profile and the antioxidant capacity. A significant positive correlation was found among TPI, FRAP or CV parameters and the concentration of caffeic, ferulic, sinapic and p-coumaric acids, and epicatechin. On the other hand, significant positive correlation was observed among antioxidant capacity (PCLACW), TPC, rutin and naringenin concentration as well as chlorogenic and isochlorogenic acids.