In this work, the feasibility of two commercial products enriched in hydroxytyrosol (HT) as alternative to
sulfur dioxide in Syrah red wines was evaluated. The HT enriched products came from synthesis and from
olive waste. Wines treated with HT were compared with wines treated with sulfur dioxide at two wine-
making stages: bottling and after 6 months of storage in bottle. Minor differences were found in enolog-
ical parameters and volatile composition (esters, alcohols and acids). Significant differences were
observed in color related parameters and sensory analysis. HT wines improved color parameters as well
as scents and tasting at bottling. However, after 6 months of storage in bottle HT wines were more oxi-
dized than SO2 wines. The olfactometry profile of HT wines supported sensory analysis. HT wines showed
new odorant zones from both the added product and oxidation.
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