How long can potatoes be kept after peeling? Why do potatoes turn black after peeling?

Potatoes are a very common food in our lives, and they are available all year round. Potatoes are rich in nutrients, and regular consumption can resist aging, prolong life, and maintain youth. Every time we peel potatoes and leave them for a while, the surface of the potatoes will turn black, which makes us very distressed. How long can we leave potatoes after peeling them, and why does the surface turn black? Let's discuss this with the editor today.

How long can potatoes be kept after peeling? Why do potatoes turn black after peeling?

1. Potatoes contain a substance called anthocyanin. After peeling the skin, they will oxidize with oxygen when exposed directly to the air and turn black.

2. Potato seeds contain an organic compound called tannic acid, which reacts with heavy metal knives or steel wool to produce tannic acid iron or tannate, causing the potato seeds to turn black.

3. After peeling the skin, wrap it in plastic wrap and put it in the refrigerator, or soak it in water and it can be stored for 1-2 days.

4. Put the peeled potatoes into water and add a few spoons of salt. This can effectively prevent the potatoes from turning black and extend their shelf life.

5. After peeling the potatoes, put them in water and add a few drops of vinegar. This can reduce the activity of enzymes in the potatoes and extend the shelf life.