Dali v8 beer has an alcohol content of 5 degrees.

Alcohol content refers to the volume percentage of ethanol in wine, usually expressed as the volume ratio at 20°C. There are three ways to express alcohol content: standard alcohol content, British alcohol content, and American alcohol content.

The degree of alcohol represents the ratio of the volume of ethanol in wine to the volume of wine as a percentage. V/V is used as the unit of alcohol degree. For example: 5% (V/V) means that 100 units of wine contain 7 units of ethanol, and it also means that 100 liters of wine contains 5 liters of ethanol.

Alcohol content is generally calculated by volume, so "Vol." will be added after the alcohol concentration to show the difference from weight calculation. In addition, the chemical formula of alcohol is C2H5OH.

Alcohol hydrometer method

1. Principle The principle of the alcohol hydrometer should be designed based on the principle of the density meter. We know that the density of ethanol is less than that of water, and the greater the corresponding degree of alcohol (ethanol), the smaller the density and buoyancy of the wine. . The alcohol meter calculates the ethanol content based on this difference.

Use a precision alcohol meter to read the alcohol volume fraction indication, look up the table for temperature correction, and find the volume fraction of ethanol content at 20°C, which is the alcohol content.

2． Instrument

Precision alcohol hydrometer: graduation value is 0.1%vol.

3. Analysis steps

Inject the sample solution (prepared by the density bottle method) into a clean and dry measuring cylinder, and let it sit for a few minutes. After the bubbles in the wine disappear, put it into a clean and dry alcohol meter, and then Press it gently without touching the wall of the measuring cylinder. At the same time, insert the thermometer, balance it for about 5 minutes, observe it horizontally, read the scale indication at the tangent point to the meniscus, and record the temperature at the same time. According to the measured alcohol meter indication value and temperature, look up the table and convert it to the alcohol content of the sample at 20°C.