Medlar and hawthorn genotypes were analyzed and also their individual organic acids, in order to better understand their use as functional foods, but also as ingredients in pharmaceutical, nutritional products and in medicine. HPLC analysis was carried out using a Surveyor Thermo Electron system. Ascorbic, oxalic, tartric, malic, citric, succinic and fumaric acids were detected. On average, malic acid was predominant with a range of 415.08 mg/100 g FW in Mespilus germanica and 1,128.68 mg/100 g FW in Crataegus pentagyna. The order of organic acid depending on their content/100 g FW was: for Mespilus germanica - malic tartric oxalic citric fumaric ascorbic succinic; for Crataegus monogyna - malic oxalic citric succinic tartric ascorbic fumaric; for Crataegus pentagyna - malic citric oxalic succinic tartric ascorbic fumaric. The data obtained in this study do confirm that medlar and hawthorn fruits are a rich source of organic acid, and their organic acid content within the 100 g was greater than human daily consumption for this required level.
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