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The object of this research is the technological process of refrigerated storage of fruit products. In order to reduce the level of losses during normal refrigeration, a technological audit is carried out to solve this problem by applying antioxidant compositions for post-harvest treatment of fruits. The aim of research is development of a new antioxidant composition and optimization of its composition. The use of this composition for post-harvest treatment of fruits contributes to the extension of their shelf life and the reduction of the level of daily loss. The treatment with antioxidant compositions (AOC) was performed in storage facilities by immersing them in pre-prepared working solutions. Exposure – 10 seconds. The fruit was dried by ventilation. Options for treatment: K – control, option 1 – DL – a mixture of dimethyl sulfoxide, ionol and lecithin. The following concentrations of active substances were studied: distinol 0–0.048 %, lecithin 0–6 %. The effectiveness of exposure to various concentrations of active substances is determined by the average level of daily loss of fruit during storage, consisting of the sum of mass losses and losses caused by microbiological diseases and functional disorders, referred to the number of days of storage. The following concentrations of active substances in the developed antioxidant composition are established by optimization: apple and pear fruits storage – distinol concentration is 0.041...0.042 %, the lecithin concentration is 2.9 %. Plum fruits storage, respectively: distinol – 0.022 %, lecithin – 3.4 %.

Substantiation of the choice of optimal concentrations of active ingredients of the antioxidant composition for fruit treatment before storage