Glasnik Zaštite Bilja, Vol. 39 No. 3, 2016.
Izvorni znanstveni članak
Evaluation of chemical composition of defect wine distillates
Marin Mihaljević Žulj
; Agronomski fakultet Sveučilištau Zagrebu
Barbara Posavec
Melanija Škvorc
Pavica Tupajić
; Agronomski fakultet Sveučilištau Zagrebu
Sažetak
The aim of this study was to evaluate the chemical composition of the distillate obtained from wine with off-flavour. The chemical composition of wine distillates obtained by distillation of Chardonnay wine with oxidation off-flavour was investigated. Distillation of wine was carried out using a simple distillation pot still by double distillation and separation the different portion of the first fraction. Volatile compounds of wine and wine distillates (acetaldehyde, ethyl acetate, methanol and higher alcohols, including n-propa- nol, isobutanol and amyl alcohols) were determined by gas chromatography and their concentration were compared to Regulation or the other values recommended for wine distillate. The obtained results suggest that oxidized wine and distillates obtained in this experiment, according to some chemical parameters deviate from the values required in the production of high quality wine distillates. Concentrations of ace- taldehyde in the resulting distillates obtained by double distillation were much higher than its sensory de- tection threshold and varied between 600 and 669 mg/L a.a. depending of the experiment variants. The other compounds analyzed in the experiment were within regulation limit and in accordance to the other
references.
Ključne riječi
distillation; wine distillate; wine oxidation; acetaldehyde
Hrčak ID:
162149
URI
Datum izdavanja:
21.4.2016.
Posjeta: 2.240 *