Put the cut grapes into a large pot and add clean water that has not touched the grapes. In this step, some people will wash it with salt, while others will wash it with starch. Actually, neither of them is right. The correct way is to wash with flour. Because flour has adsorption, it will stick dirty things on the surface of grapes, which is an effect that alkaline water and salt water can't achieve.

After adding flour, stir in one direction by hand until the flour is completely melted, and then soak for 10 minute. After a while, you will see a lot of dirty things floating on it, which you can't see if you only use water.

10 minutes later, stir in one direction for a while. Then take out the grapes and have a look. They are glittering and translucent, and the water in the basin is full of black spots and dirt. Finally, rinse with clear water and let the grapes be thoroughly washed.

Selection method of grapes

1, the grape stems are fresh, and the fruit powder on the surface of the fruit grains remains intact, so the grapes are relatively fresh.

2. There is no spot residue on the surface of the grapes, which means that they have not been sprayed before harvesting, and there are few pesticide residues, which are not polluted by diseases and are relatively green and healthy.

3. The grapes are complete, symmetrical in size, moderate in elasticity and full in granules.

4. Choose grapes with dark skin, which ensures the sweetness of grapes. If you want to eat sweet, you must choose grapes with black skin.

5. It is recommended to choose a relatively firm and hard grape. This kind of grape is also very safe for everyone to eat, because it is very fresh and has just been picked. Many grapes with soft appearance take too long to pick and lose too much water.

If conditions permit, you can taste it before deciding whether to buy it.

The above contents refer to Baidu Encyclopedia-Grape.