THE EFFECT OF COLD STORAGE ON THE CONTENT OF ORGANIC ACIDS AND SUGARS IN APPLE JUICE

Abstract

The paper examines the effect of cold storage of apples on the composition of apple juice obtained from fresh and stored fruits. Changes in the content of basic organic acids (malic, citric, acetic, tartaric) and sugars (glucose, fructose, sucrose), as well as total acidity, pH, total sugar content, and sweetness index were evaluated. After 140 days of storage at a temperature of 1-2 °C, statistically significant differences were observed in the content of citric and malic acids, total acidity, pH, as well as in concentrations of fructose, glucose and sucrose. At the same time, the overall sugar content and sweetness index did not change significantly. The results show that cold storage affects the balance of organic acids and sugars in apple juice, changing its taste characteristics and nutritional value.