Key aroma compounds in apple juice-changes during juice concentration

Potent apple juice odorants, including 1-butanol, β-damascenone, dimethyl sulfide, ethyl butanoate, ethyl 2-methylbutanoate, hexanal, 1-hexanol, (E)-2-hexenal and 1-octen-3-one were quantified using stable isotope dilution assays in juice and in the aroma fractions thereof obtained by an industrial juice concentration process. Results showed a distinct loss of the major juice aroma component β-damascenone during juice concentration. High losses were also found for dimethyl sulfide and 1-octen-3-one.