Boiled lotus root can be blanched in boiling water at 100°C for 70 seconds to make all polyphenol oxidase inactive and stop the transformation process of polyphenols into quinones, thereby preventing browning and the soup will not change. Dark.

Tips to prevent lotus roots from turning black:

1. Soak in salt water:?

Lotus roots contain a lot of polyphenol oxidase, which reacts with the air Long-term exposure can cause the classification in lotus roots to oxidize into black quinone substances. Salt water can reduce the amount of oxygen ions in the water, avoid direct contact between air and lotus roots, and prevent the lotus roots from turning black after being cut. ?

2. Soaking in boiling water: ?

The polyphenol oxidase contained in lotus root is sensitive to high temperatures. Soak the cut lotus root slices in boiling water for 2 to 3 minutes to remove them all. The polyphenol oxidase in lotus root is soaked in cold water to remove the heat, so that the lotus root slices treated in this way will not turn black in the air after being picked up. ?

3. Refrigeration in plastic wrap: ?

A small amount of uncut lotus roots can be left at room temperature for a week, but the cut parts are prone to rot. Cover the incision with plastic wrap and keep it refrigerated for about a week. ?

Extended information

Precautions for eating lotus root: ?

1. People with spleen deficiency and cold stomach, and those prone to diarrhea should not eat raw lotus root because its properties are biased. Cold, raw lotus root is difficult to digest and affects the spleen and stomach, so it is better to eat cooked lotus root. ?

2. It is best not to eat lotus root raw. Some lotus roots are parasitized by Fasciolopsis ginger, which can easily cause Fasciolopsis ginger disease. When a person eats raw lotus roots with metacercariae, the metacercariae will develop into adult worms in the small intestine. The adult worms will attach to the intestinal mucosa and cause intestinal damage and ulcers, abdominal pain, diarrhea, indigestion, and facial edema in children. , developmental delay, mental retardation and other symptoms. ?

People's Daily Online - Can lotus roots be eaten if they turn black after being stored for a long time? How to preserve lotus roots without turning black

People's Daily Online - What are the benefits of eating lotus roots before and after Slight Heat? Teach you how to prevent lotus roots from turning black Black