Introduction. Citrus industrial crops - lemon, orange, mandarin and grapefruit - are of great national economic importance. The fruits of citrus crops have very high taste, nutritional and dietary properties. They contain sugars, acids, mineral salts, vitamins C, D, PP. The fruits of plants of the genus Citrus are an important source of vitamin C, [4] but their nutritional value is not limited to this component. The fruits are rich in monosaccharides and fiber and contain numerous micronutrients, including folic, nicotinic and pantothenic acids, thiamine, riboflavin, potassium, calcium, magnesium, phosphorus, copper and vitamin B6 . Compared with the fruits of other species, citrus fruits are distinguished by the high strength of the vitamins they contain, not only during storage, but also during the production of juice and canning.

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