Relevant professional departments analyzed the samples of homemade wine, and the results showed that the samples contained different concentrations of methanol and fusel oil. The production of methanol and fusel oil mainly comes from raw materials.
On the one hand, the pectin in grape skin is decomposed into methanol under the action of pectinase or heat energy, and mildew will also produce a lot of methanol. The more thorough the fermentation, the higher the methanol content. On the other hand, protein in grapes is hydrolyzed into amino acids, and then fusel oil is generated under the catalysis of enzymes.
Although it is economical to make their own wine, at present, most families have not removed methanol and fusel oil in the process of making wine. Everyone should be careful when brewing and drinking wine by himself, so as to avoid the harm of this toxic and harmful substance to health.
Extended data
Wine color classification
1, white wine: made of white grapes or grapes with red skin and white meat. The color of wine is yellowish with green, almost colorless or yellowish, straw yellow and golden yellow. Any color such as dark yellow, khaki, tan or tan does not meet the color requirements of white wine.
2. Red wine: It is made from grapes with red skin and white meat or red meat by mixed fermentation of grape skin and grape juice. The color of wine is natural deep ruby red, ruby red, purple red or pomegranate red, and any yellow-brown, brown or earthy brown does not meet the color requirements of red wine.
3. Pink wine: made from colored red grapes by skin fermentation or separation fermentation. Wine is light red, pink, orange or rose. Any color that is too dark or too light does not meet the requirements of pink wine.
This wine tastes fresh and fruity, and the tannin content should not be too high. Rose grape, Pinot Noir, Chardonnay and French blue are all suitable for making pink wine. Another red and white wine blended in a certain proportion can also be regarded as pink wine.
People's Daily Online-Self-brewed wine should be drunk with caution, and four minefields should be avoided in daily drinking.