Identification method 2: put a drop of white wine in the palm of your hand, then cross your hands to make the two palms contact, and rub hard for a few times to make the pure grain white wine smell fragrant after heating and last for a long time; The liquor blended with alcohol has only the flavor of essence, which not only smells strange, but also stays for a short time and soon loses its flavor.
Identification method 3: use sodium hydroxide, also known as caustic soda. Put the liquor to be tested and caustic soda in a test tube at a ratio of 50: 1, or use a cup that can be heated at home at ordinary times, and then boil it in hot water for a few minutes. If it is grain-brewed liquor, the liquor in the test tube will turn yellow.
If the color is very light, it means that the pure grain wine is impure and contains alcohol blending ingredients. It is pure blended wine, and there is no discoloration, because the blended wine will not react chemically when it meets caustic soda.
Extended data:
In fact, alcohol content is only a physical and chemical index of liquor. The main sensory indexes of liquor quality include appearance, aroma, taste and style besides the physical and chemical indexes required by national food regulations. Alcohol can affect more aroma, taste and style. Old drinkers often criticize that low-alcohol liquor tastes like water, but they think that good liquor must be high-alcohol liquor, and drinking 70 degrees feels like 50 degrees.
With the progress of science, brewing technology has also been developed. Today, high-alcohol wine is no longer a good wine. The alcohol content of high-alcohol liquor is higher than that of water, so it is easier to ignite. If it is low-alcohol liquor, it is difficult to ignite.