Winter jujube is a very common fruit. It is the season when winter jujube goes on the market in large quantities in every year's September. The sweet and crisp winter jujube is the favorite of many people. Each one is very round and lovely, and it also crunches when eating. However, consumers also reflect that sometimes the winter jujube bought back looks very red and attractive, but it tastes very astringent. How can it be returned What happened?
Why does winter jujube turn red?
Winter jujube will turn red when it is soaked in boiling water. After 5 seconds, the skin of winter jujube will change. At first, the skin will turn yellow slightly, and then it will turn light brown half an hour later. The next day, the color of winter jujube will turn red brown. This is because the pericarp of winter jujube contains anthocyanin, which will turn red when it is hot, so drench winter jujube with boiling water, and winter jujube will turn red immediately.
In fact, in addition to discoloration, many illegal traders will use saccharin water to soak winter jujube, which is really hateful.
It is reported that a stall owner who is not willing to give his name told reporters that this' technique 'of making winter jujube sweet does exist and seems to have been made public in the industry. Illegal traders will boil the saccharin with water, and then soak the cheap winter dates in the saccharin water. After a period of time, the skin of winter jujube will be scalded red, which looks like it's ripe. After soaking in sugar water, winter jujube will also taste more sour and sweet, in fact, it's literally "saccharin jujube".
How to identify saccharin dates?
1, look. Winter jujube soaked with saccharin will turn red, but the distribution is relatively uniform, and the red degree of naturally mature winter jujube varies.
2, touch. Once soaked by saccharin, the skin of winter jujube is wrinkled and soft to touch, while that of ordinary winter jujube is hard to touch, and the skin is very smooth and delicate.
3, taste. The pickled winter jujube tastes sweeter, but the sweetness is only on the skin. If the skin of winter jujube is sweeter and the pulp is astringent and bitter, it is likely to be soaked.