Effect of fungicide residues on the aromatic composition of white wine inoculated with three Saccharomyces cerevisiae strains.
The effects of three fungicide residues (cyprodinil, fludioxonil, and pyrimethanil) on the aromatic composition (acids, alcohols, and esters) of Vitis vinifera white wines (var. Airén) inoculated with three Saccharomyces cerevisiae strains (syn. bayanus, cerevisiae, and syn. uvarum) are studied. The aromatic exponents were extracted and concentrated by adsorption-thermal desorption and were determined by gas chromatography using a mass selective detector. The addition of the three fungicides at different doses (1 and 5 mg/L) produces significant differences in the acidic fraction of the aroma, especially in the assays inoculated with S. cerevisiae, although the final contents do not exceed the perception thresholds. The lower quality wines, according to isomeric alcohol content [(Z)-3-hexen-1-ol and 3-(methylthio)propan-1-ol] are those obtained by inoculation with S. cerevisiae(syn. bayanus) and addition of cyprodinil. The addition of fungicides in the assays inoculated with S. cerevisiae (syn. bayanus) produces an increase in the ethyl acetate and isoamyl acetate contents, which causes a decrease in the sensorial quality of the wine obtained.
Departamento de Química Agrícola, Geología y Edafología, Facultad de Química, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain.
María Angeles
MA
García
José
J
Oliva
Albero
A
Barba
Miguel Angel
MA
Cámara
Francisco
F
Pardo
Eva María
EM
Díaz-Plaza
D000143:Acids / Q000032:analysis; D000438:Alcohols / Q000032:analysis; D004149:Dioxoles / Q000494:pharmacology; D004952:Esters / Q000032:analysis; D005659:Fungicides, Industrial / Q000494:pharmacology*; D009812:Odorants / Q000032:analysis*; D011743:Pyrimidines / Q000494:pharmacology; D011758:Pyrroles / Q000494:pharmacology; D012441:Saccharomyces cerevisiae / Q000187:drug effects / Q000378:metabolism*; D014920:Wine / Q000032:analysis* / Q000382:microbiology*
D000143:Acids; D000438:Alcohols; D004149:Dioxoles; D004952:Esters; D005659:Fungicides, Industrial; D011743:Pyrimidines; D011758:Pyrroles; C108338:cyprodinil; C108337:pyrimethanil; C108339:fludioxonil