Why is the soup boiled from purple potatoes blue black?

The soup cooked from purple potatoes is blue-black because purple potatoes contain blue-black anthocyanins, which are water-soluble pigments.

Purple Sweet Potato (Ipomoeaa batatas (L.).) poir.Convolvulaceae) is also known as black potato, and the flesh of the potato is purple to dark purple.

In addition to having the nutrients of ordinary sweet potatoes, it is also rich in selenium and anthocyanins. Purple sweet potato is one of the main raw materials of anthocyanins.

Edible value: It is rich in protein, starch, pectin, cellulose, amino acids, vitamins and a variety of minerals, as well as selenium and anthocyanins. Purple sweet potato is rich in nutrients and has special health care functions, and the protein and amino acids in it are easily digested and absorbed by the human body.

It is rich in vitamin A can improve vision and mucosal epithelial cells, vitamin C can make collagen protein synthesis normally, prevent and treat the occurrence of scurvy, anthocyanins are natural powerful free radical scavengers.

In addition to the nutrients of ordinary sweet potatoes, they are also rich in selenium, iron and anthocyanins. Ranked first among the anti-cancer vegetables published by the National Vegetable Cancer Research Center in Japan. In addition, purple sweet potato can also be peeled, dried and crushed and processed into powder, beautiful color, rich in nutrition, is an excellent food processing raw material, can be used as the main material or ingredient of various pastries.

At the same time, purple sweet potatoes will also become one of the main raw materials of anthocyanins. Purple sweet potato has certain health care functions from the young leaves at the tip of the stem to the tuber, and is the food in the current pollution-free, green and organic food.

Purple potatoes usually turn blue after cooking, this is because of anthocyanins, purple potatoes contain a lot of anthocyanins, anthocyanins will be red when exposed to acidic water, blue when exposed to alkaline water, purple when exposed to neutral water, and tap water is weakly alkaline, so purple potatoes will become "blue potatoes" after cooking.

Purple potatoes contain starch and iodized salt to turn blue, and the plant pigments in purple potatoes dissolve in water, which is this color.

Purple sweet potato is that color.

The plant pigments in purple sweet potatoes are dissolved in water.

Cells break down color melt water!

This is because purple potatoes are rich in anthocyanins, which turn blue when exposed to alkali and purple when acid; Generally speaking, if you cook it in tap water, the purple potato porridge is usually purple, if it is boiled in mineral water or in contact with alkaline substances, such as the water quality is alkaline, or some partners like to cook it with edible alkali, it will make the purple potato porridge turn blue. This is normal. Purple sweet potato contains anthocyanins, which are soluble in water and will show different colors in an acid-alkaline environment, if the water is acidic, it will be reddish, and if the water is alkaline, it will be blue or green.

It is also a way to test the acidity and alkalinity of water.

Purple sweet potato is rich in selenium and iron, which are essential elements for anti-fatigue, anti-aging and blood replenishment. Eating purple potatoes can be **, bodybuilding, prevent sub-health, laxative and detoxification. Each 100 grams of fresh purple potatoes contains only grams of fat, producing 99 kilocalories, about 1 3 of rice, which is a good low-fat, low-calorie food, and can effectively prevent sugars from turning into fat.

Because purple potatoes, purple cabbage and other purple ingredients contain anthocyanins, anthocyanins will turn green when they encounter alkaline substances, and purple potatoes will also turn green when baking soda is put in them, which is also the reason. But it is edible and harmless to the body. Purple potatoes contain a large amount of anthocyanins, anthocyanins appear red in an acidic environment, black and green in an alkaline environment, and its color will change when the environment changes, but it is edible.

However, adding alkali will damage the nutrients in purple potatoes to a certain extent, and it is not recommended to add alkali.

If the color of the porridge is blue after cooking the porridge with purple potatoes, it may be because it has been exposed to the air for too long, causing the purple potatoes to oxidize, so they turn blue.

Because the color of purple potatoes is darker, the porridge will turn blue after cooking.

Because this food contains anthocyanins, which is a water-soluble color, it will show different colors in different environments, if it encounters an acidic environment, it will appear red, and if it encounters an alkaline environment, it will appear blue-green, therefore, in daily life, it is normal for us to appear blue when we boil purple potato soup.

The water used to boil the soup is generally tap water, and the tap water is generally alkaline water after purification, and the anthocyanins are precipitated when the purple potatoes are boiled with alkali and caution, which is naturally blue.

When the purple potato soup is boiled, you can add some lemon juice or white vinegar, so that it will not be white.

Generally speaking, the same size of purple potatoes should be selected with a heavier scale, and the taste will be sweeter.

When buying purple potatoes, don't choose round ones, it's best to choose long strips of purple potatoes, and give priority to spindle-shaped ones in the same pile of purple potatoes, which will taste better.

A good purple potato looks very smooth on the outside, and if there are dark spots on the skin, don't buy such a purple potato. Purple potatoes with black spots and early reeds will have a strange smell, and rotten purple potatoes are poisonous, so don't choose such ones.

Add an appropriate amount of rice wine.

After the purple potato is cooked, add an appropriate amount of rice wine to the purple potato soup, so that you can clearly see the purple potato soup from green to purple, and wait until it is boiled again and add an appropriate amount of flour to stir into a batter and boil it again.

Add white vinegar or lemon juice.

Generally, you can add a few drops of white vinegar or lemon juice to the boiled purple potato porridge, which can also make the color of the porridge purple.

Add more purple potatoes. Another method is to increase the amount of purple potatoes and then reduce the amount of rice, so that the color of the boiled purple potato porridge will also be purple.

First, peel the purple sweet potato, cut it into cubes, wash it and set aside.

Add the rice to the water and soak for about half an hour.

Add the processed diced purple sweet potato and rice to the casserole, add an appropriate amount of water, bring to a boil over high heat, and then turn to low heat and simmer.

Simmer over low heat until the purple potatoes melt and are sticky and ready to eat.

Improve immunity Purple potato porridge contains iron and selenium, which can play a good role in anti-fatigue and anti-aging through the body, and can also have a good blood tonic effect, which has a good effect on improving the body's immunity.

Regulate the stomach Purple potato porridge is rich in cellulose, which can speed up the peristalsis of the stomach and intestines, so as to remove the mucus and some residues left in the stomach and intestines, so as to regulate the stomach and intestines well and prevent some gastrointestinal diseases.

Purple potato porridge has a lot of carbohydrate content, and the fat and calories are also relatively low, when its own anthocyanins and some trace elements enter the body, it can well prevent the conversion of human sugars into fat, so as to decompose the fat stored in the human body very well, which has a good effect on some people who are fit.

1.Why is purple potato soup blue.

2.Why is the water from purple potatoes boiled blue.

3.Why is the porridge I made out of purple potatoes blue.

4.Why did purple sweet potato boiled porridge turn blue-green.

5.Why is the soup boiled from purple potatoes green.

6.Why is the soup boiled from purple potatoes blue-black?

7.Why is the water from purple potatoes blue-green after boiling.

8.What color should the soup from the black chicken stew be.

Why is purple sweet potato soup blue Purple sweet potato has a high edible value, and because it is good and cheap, it has become one of the foods that we always prepare in our kitchen.

Purple potatoes are rich in fiber, which can promote digestion, improve gastrointestinal function, and prevent the occurrence of gastrointestinal diseases, so some people with indigestion will cook purple potatoes to improve their stomach, but the porridge cooked by purple potatoes is blue.

Is this normal?

In fact, the color of purple potato porridge is blue, which is normal, because purple potatoes are rich in anthocyanins, which are water-soluble pigments, and anthocyanins will change color when they encounter acid and alkaline, and they will be blue-green when they encounter alkalinity, and they will be red when they encounter acidity, which is a normal phenomenon and can be eaten with confidence.

Why is the water boiled out of purple potatoes blue Because purple potatoes are rich in anthocyanins, which are water-soluble pigments, and anthocyanins will change color when they encounter acid and alkaline, and they will be blue-green when they encounter alkalinity, and they will be red when they encounter acidity, which is a normal phenomenon and can be eaten with confidence.

The color of purple potatoes is due to the anthocyanins in it, which are purple in a neutral environment, purple-red in an acidic environment, and bluish in an alkaline environment.

Generally, boiled purple potato porridge and the like are easy to turn blue or even green due to water or other reasons.

All you need to do is add a little acidic liquid like white vinegar or lemon juice to turn purple again.

Purple potatoes have a high edible value, and because of their high quality and low price, they have become one of the foods that are always prepared in our kitchens.

Purple potatoes are rich in fiber, which can promote digestion, improve gastrointestinal function, and prevent the occurrence of gastrointestinal diseases, so some people with indigestion will cook purple potatoes to improve their stomachs, but the porridge cooked by purple potatoes is blue and rejuvenated.

Is this normal?

In fact, the color of purple potato porridge is blue, which is normal, because purple potatoes are rich in anthocyanins, which are water-soluble pigments, and anthocyanins will change color when they encounter acid and alkaline, and they will be blue-green when they encounter alkalinity, and they will be red when they encounter acidity, which is a normal phenomenon and can be eaten with confidence.

1. Purple potato soup is blue because this food contains anthocyanins.

Xiaoling 2, this is a water-soluble color, will show different colors in different environments, if the rock is known to the acidic environment will appear red, if the alkaline environment will be rough rise blue-green, therefore, in daily life, when we boil purple potato soup, it is normal to show blue.

The soup of purple potatoes is blue and can be drunk, and the color of purple potatoes boiled is blue, which is a normal situation. Because purple potatoes contain anthocyanins, which are water-soluble pigments, and anthocyanins will change color when they encounter acid and alkalinity, red when they encounter acidity, and blue-green when they encounter alkaline, which is a normal phenomenon and can be eaten with confidence.

Generally, the water used to cook purple potatoes is green, and the color is a little strong, this is because purple potatoes contain anthocyanins, and anthocyanins are a kind of alkaline substances that will turn blue-green, and acidic substances will turn red. The tap water that is commonly drunk at home is generally alkaline, so the color of the water used to cook purple potatoes is blue-green and balanced. Purple sweet potato soup turns blue because the water used to cook the soup is alkaline water, at this time, as long as you add some acidic liquid to it, you can change the color back, lemon juice and white vinegar are common acidic liquids, pour some when boiling the soup can regret the difficulty and change the color.