| Popis: |
Moderate and regular consumption of phenolic-containing alcoholic beverages has been associated with health benefits. The aim of this work was to evaluate mistletoe spirits quality and whether they contain polyphenols and have antioxidant activities. The total polyphenol content (TPC) and antioxidant activity were estimated using spectrophotometric methods (Folin-Ciocalteu, DPPH and FRAP). Some spirits have high TPC, DPPH and FRAP antioxidant activities and stimulation of moderate consumption of mistletoe spirit is justified. As analysis of aroma compounds is one of the most important steps in the evaluation of spirit quality, the aroma composition of mistletoe spirits was determinated for the first time, using GC/MS, solid-phase microextraction (SPME). A total number of 166 aroma compounds in mistletoe spirit samples were determinated. FTIR spectra were registered to create calibration models to predict TPC and antioxidant activities in unknown mistletoe spirits. The determination coefficients in calibration and prediction models were greater than 0.8, suggesting strong correlation of predicted parameters based on the FTIR spectra. |
