The influence of cultivar and enzyme treatment on the aroma complex of apple juice

This paper aims to determine the influence of a cultivar (Golden delicious and Granny Smith) and enzyme treatments (hot and cold) on the aroma complex of clear apple juice. While the composition of aromatic components of the juice was determined by Gas Chromatography Mass Spectrometry (GC/MS) technique, a panel of 24 semi trained evaluators carried out sensory analysis. There are certain differences in the identified aromatic compounds of juice produced of these two apple cultivars. The most abundant aromatic compounds of apple juice were esters and aliphatic alcohols. Juice made from Granny Smith are determinated with higher content of 2-methylbutyl acetate (isoamyl acetate), hexyl acetate, hexyl butanoate, butyl butanoate, butyl acetate, pentyl acetate and butyl propanoate. It is possible to connect enzymatic treatments with some of the esters. Three esters such as1-(1.1-Dimethylethyl)-2-methyl-1.3-propanediyl 2-methylpropanoate, methyl dihydrojasmonate and ethyl butanoate are specific for the hot enzyme treatment. Cold depectinization processes could be recommended for the juice industry because this treatment better protects aromatic compounds. The panellist preferred apple juice of Granny Smith with flavours which stand for the typical aroma of ripe apples.