27Liquid chromatography-electrospray-tandem mass spectrometry MS/MS) was applied to the analysis and authentication of fruit-based products and fruit-

21Capillary zone electrophoresis (CZE) and high performance liquid chromatography (HPLC) 22 were applied to the authentication of fruit products based on the compositional profiles of 23 polyphenols. Various sample treatments were used to maximize the overall recovery of polyphenols 24 or specific fractions such as phenolic acids or anthocyanins. The resulting CZE and HPLC data was 25 treated with Principal Component Analysis (PCA) showing that samples were mainly clustered 26 according to the fruit of origin, with cranberry-and grape-based products clearly separated in 27 groups. A possible adulterated cranberry extract was analyzed more deeply by high resolution mass 28 spectrometry (HRMS) in order to identify the presence of A-type proanthocyanidins which are 29 characteristic and more abundant in cranberry-based products. In accordance with PCA 30 interpretation, HRMS results indicated that the suspicious sample was not a cranberry-based 31 product, allowing us to validate and demonstrate the suitability of both CZE and HPLC proposed 32 methods for the characterization of fruit-based products. 33 34