How do you clean leafy greens? How to wash leafy vegetables to be clean

As a kind of vegetable growing in the land, green vegetables should be carefully cleaned, responsible for the health of themselves and their families, the first step of cleaning green vegetables is to wash away the dust, green vegetables grow from the land, and there will be a large amount of dust and other pollutants attached to the vegetable leaves every day.

The greens bought back are first rinsed off with running water, then soaked in water for half an hour, and then changed to water and soaked in brine for a second time for 5 minutes, which can be sterilized and disinfected.

It is best to use the water saved by washing rice to clean vegetables again, washing rice water can decompose pesticide residues, if you are still not at ease, you can blanch the vegetables after soaking, and take them out for cooking.

1. Soak in water for washing: Generally, rinse off the surface dirt with clean water, remove the visible stained parts, and then cover the fruits and vegetables with clean water, and soak in flowing water for no less than 30 minutes. Soak 2-3 times in this way, basically remove most of the residual pesticide components.

2. Use rice washing water.

Washing: Rice washing water is acidic, and organophosphorus pesticides will lose their toxicity when they encounter acidic substances. Soaking in rice washing water for about 10 minutes and washing it with water can reduce the pesticide residue in vegetables.

3. Light salt water.

Soaking: Generally, vegetables should be rinsed with water at least 3 to 6 times, then soaked in light salt water for 1 hour, and then rinsed with water 1 time. Vegetables such as appetizers can be cut first, soaked in water for 2 hours, and then rinsed with water to remove residual pesticides.

4. Alkaline water. Soaking and cleaning: Most organophosphorus insecticides can be quickly decomposed in an alkaline environment, so soaking in alkaline water is one of the effective ways to remove pesticide residues from vegetables and fruits. Generally, edible alkali is added to 500 ml of water.

5-10 grams of alkaline water, put the fruits and vegetables after the initial rinsing into the alkaline water, according to the amount of vegetables, with enough alkaline water, soak for 5-15 minutes and rinse with water, repeat the washing about 3 times The best effect.

Cut off the green leafy cabbage first, because there is a lot of dirt hidden in the cabbage, such as mud, and then rinse the vegetables with running water to wash some of the dirt on the vegetables.

You can wash it well three times with running water, and of course you can soak it before washing.

1. Soaking in light salt water: Generally, vegetables should be rinsed with water at least 3 to 6 times, then soaked in light salt water, and then rinsed with water 1 time. For cabbage vegetables, you can cut them first, soak them in clean water for 1 to 2 hours, and then rinse them with water to remove residual pesticides.

2. Wash with dish soap: dilute the dish soap to 300 times and wash it once, and then rinse it with water 1 to 2 times, which can remove germs, insect eggs and residual pesticides on vegetables.

3. Soak in boiling water: The best way to remove some residual pesticides is to scald, such as green peppers, cauliflower, beans, celery, etc., and it is best to scald it with boiling water before putting it into the pot. According to tests, this method can remove 90% of the pesticide residue.

4. Washing with rice washing water: washing vegetables with rice washing water can remove some of the pesticides remaining in the vegetables. Because most of the organophosphorus pesticides such as methamidophos, phosphine, dichlorvos, and dimethoate are used to kill insects in China, these pesticides will lose their toxicity when they encounter acidic substances.

Soak in rice washing water for about 10 minutes and wash it with water to reduce the pesticide residue in vegetables.

Summary. Two beakers, one large and one small, the large one is put in water, the small one is put in alcohol, the small one is put in the large one, and the leaves are put in the alcohol, and heated. It is called "alcohol water barrier heat", which aims to remove chlorophyll from the leaves, and the water barrier is due to the low ignition point of alcohol.

Experiment Name: Chlorophyll Removal Experimental Equipment: Beaker, Fresh Green Leaves, Alcohol, Tripod, Asbestos Net, Match, Erlenmeyer Flask Experiment Purpose:

The leaves of plants are green, which is because they contain chlorophyll, is there any way to isolate the chlorophyll?

It is the leaf of the tree.

Two beakers, one large and one small, the large one is put in water, the small one is put in alcohol, the small one is put in the large one, and the leaves are put in the alcohol, and heated. It is called "alcohol isolation friends and water heat", the purpose is to remove the chlorophyte in the leaves, and the water isolation is because the alcohol ignition point is low. Experiment Name:

Chlorophyll removal equipment: beaker, fresh green leaves, alcohol, tripods, asbestos nets, matches, Erlenmeyer flasks Purpose: The leaves of plants are green, which is because they contain chlorophyll, is there any way to isolate chlorophyll.

Experimental steps: 1. Put a piece of green leaf grinding tape into an Erlenmeyer flask, and then add alcohol until the leaves are submerged. 2. Put the Erlenmeyer flask into a large beaker and pour hot water into the large beaker.

3. Put the asbestos net on the tripod, then put the large beaker on it, and light the alcohol lamp to heat. 4. After a while, you will see that the colorless alcohol in the small beaker has completely turned green, and these green substances are chlorophyll. Experimental Analysis:

Chlorophyll can be dissolved in alcohol, and when it is heated and boiled, chlorophyll will escape into the alcohol, so the alcohol blind reed turns green.

There is no other way.

Just get rid of the green.

That was too cumbersome with alcohol.

The method of washing away chlorophyll is to heat the leaves by soaking them in alcohol. Stay safe. If you get it on your clothes, soak it in hot water, pour alcohol on it, and then try it with hot water.

Soak the leaves into the liquor and heat them in water for about 2-3 hours, the simplest alcohol chlorophyll is soluble in organic solvents, and the color of iodine solution will affect the observation of complex points, cut the leaves into a small test tube containing 95% ethanol, vacuum until the leaf segments are completely immersed in the ethanol, cover, prick a small hole in the lid with a needle, and keep warm in a 70 water bath until the chlorophyll disappears, that is, the leaves turn white (about 20min). If chlorophyll needs to be completely removed, the ethanol should be replaced once when it is kept warm for 10min, in fact, as long as it is bleached by removing color, it will not destroy the original tissue of the leaves.

1. Leafy vegetables: The classification of vegetables is relatively wide, but we commonly have leaf-based vegetables, greens, cabbage, leeks and so on. This type of vegetable has its roots removed, then washed under running water, and soaked in salt water to destroy bacteria.

2. Melons and eggplants: melons and fruits are also popular with everyone, such as eggplants, green peppers, pumpkins, loofahs and so on. This type of vegetable is the best to clean, we first remove its outer skin and then wash it to avoid the loss of nutritional value of the food.

Eggplant is not needed because its skin is nutritious.

3. Fresh beans: There are many foods of beans, edamame, lentils, peas, etc., they all have skins, some can be eaten, some are not edible, and those that can be eaten must be cleaned.

4. Cruciferous: This kind of vegetables have become more and more popular in recent years, including cabbage, broccoli and other foods. They are very high in anthocyanins and can resist cancer, and when we wash them, we can pick up all their leaves and wash them one by one.

5. Rhizomes: This kind of food is the fruit grows in the soil, there are Suisanjing radish, yam, bamboo shoots and other foods, growing in the soil, then it will have a lot of pesticide residues, so this kind of food must be carefully washed, but also soaked in salt water. The outer skin is removed and then washed.

1. Soaking and washing method: only part of the polluted pesticides can be removed, but washing is the basic method of removing pesticides on green vegetables, generally rinsing off the surface dirt with water, and then soaking with water for no less than 10 minutes.

2. Alkaline water immersion method: organophosphorus pesticides decompose rapidly in an alkaline environment, and soaking in alkaline water is an effective measure to remove pesticide pollution. The method is to rinse the surface dirt first, soak it in alkaline water (generally add 5-10g of alkaline surface to 500ml of water) for 5-15min, and then rinse it with water 3-5 times.

3. Salt water cleaning method: using 1%-3% of the light salt water to wash vegetables can not only remove some pesticides, but also remove various small insects hiding in the ground position of the root section or the back of the vegetable leaves.