Does gutter oil crackle in the pan when heated?

Yes, but if there is water in the pot, the oil will ring.

The reason why the oil makes a loud noise when heated is because the oil is impure and contains other substances. Their boiling point is lower than that of oil, and the temperature of the oil rises, exceeding the boiling point of impurities, and the impurities burst so they make a loud noise.

The crackling of hot oil in the pan has nothing to do with the oil, but the sound caused by the reaction of water or other things in the pan with the oil. The easiest way to detect if there is gutter oil is:

1. Put a peeled garlic clove when stir-frying, garlic is most sensitive to aflatoxin. If the garlic turns red, it is gutter oil, which contains a lot of aflatoxin. If the cooking oil is good, the garlic is white.

2. Put the oil in the refrigerator for 2 hours, if there is a white foam, it is gutter oil. Give people the hand of roses, which lasts for a long time If it is helpful to you, please click on the praise

Yes, there is. Take a look. Looking at the transparency, the pure vegetable oil is transparent, and the transparency will decrease due to the mixing of alkali lipids, waxes, impurities and other substances in the production process; Look at the color, the pure oil is colorless, in the production process because the pigment in the oil is dissolved in the oil, the oil will be colored; Looking at the precipitate, its main component is impurities.

Second sniff. Each oil has its own unique smell. You can put a drop or two of oil on the palm of your hand, rub it with your hands together, and smell it carefully when you are hot. If there is a peculiar smell of oil, it means that there is a problem with the quality, and the smell is likely to be gutter oil; If there is a smell of mineral oil, you can't buy it.

Three tastes. Take a drop of oil with chopsticks and taste it carefully. Oil with a sour taste is an unqualified product, oil with a burnt bitter taste has become rancid, and oil with a peculiar smell may be "gutter oil".

Four listening: Take a drop or two of oil from the bottom of the oil layer, apply it to a flammable piece of paper, light it and listen to its sound. Qualified products are those that burn normally and silently; If the combustion is abnormal and makes a "squeak" sound, the moisture exceeds the standard, and it is an unqualified product; When burning, it makes a "crackling"** sound, indicating that the moisture content of the oil is seriously exceeded, and it may be an adulterated product, and it should never be purchased.

Five questions: ask the merchant's purchase channel, and ask for the purchase invoice or check the sampling test report of the local food safety supervision department if necessary.

No matter what kind of oil, as long as there is water in it, it will crackle, if you want to distinguish the gutter oil and other oil is hot, look at the color of the oil'The soybean oil is clear, and the gutter oil is slightly cloudy. And when you fry something'The smell of the smoke is also different...

No matter what kind of oil it is, as long as it crackles, it can only mean that there is water in the oil, and it cannot be judged by just evaluating whether it is gutter oil or not.

There is moisture in the crackling sound. It cannot be used to distinguish gutter oil!

No matter what oil has moisture, it will

This one will do, as long as it is oil.

Normal, especially when the power is first turned on, it will crackle, expand and contract, normal.

I just bought it and will think about it. It's not steady. I don't know if it's safe.

Oil is hotter than water, that's why it's like this. On the other hand, if the oil is put in boiling water, there is no such thing. Oil is something lighter than water, and the water sinks to the bottom and the oil is on top of the water.

The density of water is greater than that of oil, there is floating on the surface, the water inside is heated to form bubbles, the bubbles rise in the process of small to large, and finally reach the surface, the heat inside rises, forming a small blast. There will be a sound, a splash.

Because the boiling point of oil is higher than that of water, so in the boiling oil pan, in fact, the temperature has exceeded the boiling point of water, but the density of water is greater than that of oil, after the water droplets fall into the oil pot, because its own gravity will pass through the oil layer and fall downward, and in this process, the water droplets quickly reach the boiling point and begin to convert from liquid to gaseous, and the oxygen dissolved in the water is also released, forming bubbles in the oil layer, the bubble surface area is large, and under the action of buoyancy, it will rise upward, and when it reaches the surface, because the bubble is formed in the oil layer, Therefore, the air pressure in the bubble is greater than the atmospheric pressure, and after the bubble floats out of the oil layer, it will burst under the pressure in the bubble, and the sound made when the bubble bursts is the crackling sound we hear, and the impulse generated when the bubble bursts will make the oil splash.

Also, the temperature of the oil is high, and the water will be boiled as soon as it goes down.

Water is water and oil is oil parallel.

If it is used after each wash, it is estimated that the wall of the pot is layered, and the sound of heating and deformation after the water enters the interlayer, it is recommended that you change the pot.

I think it's because your pot is too hot for heat.

That's the sound of oil popping when it meets moisture.

It's not that you have too little water, or the cage drawer is not put properly.

The boiling point of oil and water is not the same, when the water is already boiling at 100 degrees, the oil temperature is far above 100 degrees, so there is a sound.

There is a trick to identifying gutter oil, and it would be a pity not to know.

3 small methods to teach you to identify gutter oil, very simple.

It can be distinguished by garlic. Here's how:

1. First prepare a clean and waterless small bowl, and then pour the oil into the small bowl.

2. Prepare a garlic clove, then peel off the skin and set aside.

3. Cut the garlic cloves into thin slices with a knife, the thinner the better, try to cut them thinly, throw the slices into the oil bowl, and then let stand for 2 hours.

4. If it is gutter oil, the garlic slices will turn red. Because gutter oil contains aflatoxin, garlic slices will turn red when they encounter aflatoxin. If it weren't for gutter oil, the garlic slices wouldn't turn color.

Gutter oil generally refers to all kinds of inferior oil that exist in life, such as first-class edible oil, repeated frying oil, etc. The largest amount of gutter oil is the grease trap of the sewer of large hotels in the city.

Long-term consumption may cause cancer, which is extremely harmful to the human body. In July 2010, the General Office issued a document and decided to organize and carry out the pilot work of resource utilization and harmless treatment of urban kitchen waste such as gutter oil.

The most practical tips to identify gutter oil, learn this trick, and no longer worry about buying gutter oil, gutter oil, buying gutter oil, edible oil, gutter oil has a peculiar smell and turbidity.

There are many ways, the simple is to ask directly about the taste or look at the appearance of the oil, and then there is a more scientific one is to drop some oil on the paper, and then burn the paper, if there is a crackling sound, the oil is likely to be gutter oil.

There is no way to distinguish this, there is no unified standard now, smell the fragrance, the gutter oil is generally not ordinary, and it is used more in the hot pot.

At this point, put it directly in the refrigerator to ice it, then you can tell before, which ones are gutter oil? Which is pure peanut oil. Gutter oil will solidify, peanut oil it won't.

Gutter oil will make a crackling sound when placed in the pot, and there may be some opaque substances in it, and you can also smell the smell of oil, if there is a peculiar smell, it is gutter oil.

I think it's really easy to distinguish gutter oil, it's not so pure, and the color is uneven, so the right eye can tell it.

Take a look. Transparent, pure, colorless, pure vegetable oil. Second sniff. Oil with a peculiar smell indicates that there is a problem with the quality. Three tastes. Oils with a sour taste are not qualified.

Cooking oil is easy to wash and clean as soon as it is scalded with hot water.

Gutter oil is viscous and difficult to clean, and hot water is not clean.

Gutter oil crackles when it is put into the pan.

You can use bai

It's just that you have to wash the pot well

The pot black zhi illustrates the dao left behind when cooking the dishes usually

The oil was burned out.

Pouring water into it will make a sound, indicating that the temperature of the pot is very high, and 1 part of the water has evaporated at the moment when the water is poured in.

Because of the principle of heat expansion and cold contraction, the dirt on the surface of the pot will fall off, and you will be fine with a scouring pad or something like that, and you will be fine with a good brush.

It can be used, the sound water does not boil, and the boiling water does not sound. Ancient words. No problem using it.

No. The oil generally does not sound after it is boiled, and the sound is that there is water in the oil.

Not necessarily, it is that there is water or other non-oily water-containing materials in the oil pan, such as vegetable leaves, noodles, etc.

It's crackling because there's water in the oil, so it's not open.

No, it's smoke on the pot.