Study On Nutritional Index Setting In Standards Of Dry Red Wine

Objective: It has been found that the polyphenols in dry red wine played an important role in human health. In order to prevent adulteration in wine and to promote consumer's health, nutritive elements and phenol substances in dry red wine were determined and the possibility of setting nutritional index in dry red wine was explored.Methods: Popular famous-brand dry red wine in the market was chosen as the samples. Sugars, acidity, alcohol and dried materials were determined according to the governmental standard of wine; Potassium, sodium, magnesium, calcium, zinc, iron and copper were determined with Atomic Absorption Spectroscopy; the polyphenols were determined with the methods commonly used in domestic and abroad. On the basis of nutritive elements and bioactivity materials measurement, combined with suitable alcohol intake and information of bioactivity materials in vivo, the biological meanings of nutritional indices were discussed, and some were recommended as nutritional indices and criteria was given.Results: 1.It was found that potassium was rich in dry red wine. If potassium was set as a nutrition index, it will be helpful to standardize the addition of grape during wine production, and wine would be a good source of potassium intake.2. The levels of total polyphenols, resveratrols, and tannin pigments in domestic dry red wine were lower than those in abroad brand, and more than domestic non-dry red wine. These differences might be produced by the addition and quality of grape.3. Total polyphenols and tannin pigments were positively related with sugar and alcohol. At the same time, they were negatively related with acidity. Resveratrol was positively related with sugar.These relationships suggested that these bioactivity materials level was related with maturity of grape4. It is possible to set total polyphenols, resveratrols and tannin pigments as nutritional indices. The priority of setting nutritional indices was total polyphenols, and then is resveratrols and tannin pigments. The level of anthocyanins will be affected by long time storage, it could not be recommended as nutritional index.Conclusion: It is possible to set nutritional indices in dry red wine standards. The value recommended was no less than 900mg/L for potassium, 1300mg/L for total polyphenols, 2mg/L for resveratrols, and 1000mg/L for tannin pigments. If a person daily drinks 150 to 250ml wine with these standards, it will be good for his health.