Specific content:

Look at the implementation standards

The implementation standards of solid liquor are GB/T10781.1(Luzhou-flavor), GB/T 1078 1.2 (Fen-flavor), GB/T 26760 (Maotai-flavor). The implementation standard of liquor by solid-liquid combination method is GB/T20822, and liquor is partly alcoholic liquor and partly grain liquor. The implementation standard of liquid liquor: GB/T2082 1, based on edible alcohol.

Hand rubbing method

Drop a few drops of white wine on the palm of your hand, then cross your hands so that they touch each other and rub them hard. Pure grain liquor smells fragrant after heating and lasts 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.

Look at hops

Shake the bottle upside down and observe the change of hops. Hops are dense and slowly disappear, and those that disappear less and faster are inferior.

Empty cup method

Pour the wine into the glass, and then pour the wine out. When you smell the empty glass, it is alcohol blended wine, and when you smell the glass for about ten minutes, it is alcohol blended wine. The brewed wine has grain fragrance, wine fragrance and bad smell. The longer the fragrance is left, the stronger the content of the brewed wine is.

Add foundation

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 we can heat 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.