What is Gutter Oil? How to tell?

Gutter oil is very harmful to the human body, mainly reflected in the following points:

The first bad is that it causes indigestion. In fact, in the process of refining "gutter oil", a series of chemical changes such as rancidity, oxidation and decomposition of animal and vegetable oils after pollution produce substances that are highly toxic to the human body, arsenic is one of them. It is worth mentioning that once the "gutter oil" with a huge amount of arsenic is used, it will cause symptoms such as indigestion, headache, dizziness, insomnia, fatigue, and liver discomfort.

The second bad is that it causes diarrhea. In fact, the production process of "gutter oil" is destined to be unhygienic, which contains a large number of bacteria, fungi and other harmful microorganisms once they reach the human intestine, the light will cause people diarrhea, the heavy will cause people nausea, vomiting and a series of gastrointestinal diseases.

The third disadvantage is abdominal pain. We know that "gutter oil" is mixed with a lot of sewage, garbage and detergents, and after being refined in the open air in underground workshops, it is impossible to remove bacteria and harmful chemicals. It is worth mentioning that it is an indisputable fact that basically all "gutter oil" will contain serious excessive lead, and eating food made of "gutter oil" with excessive lead content will cause severe abdominal colic, anemia, toxic liver disease and other symptoms.

So, how do we identify gutter oil?

The first point is to look. We can distinguish gutter oil by looking, because normal edible oil, the color is transparent, gutter oil is repeatedly used, and made by special processing, so it contains various chemical elements, the color is turbid, and the bottom of the bottle is prone to sediment.

The second important point is to smell. The commonly used edible oil is made by squeezing the juice of various crops, so it has a fragrant taste, while gutter oil can directly smell the sour and peculiar smell because of the chemical composition in it, which is uncomfortable.

The third point is to taste. We can prepare a chopstick, dip a drop of oil in the palm of the hand, merge the hands, gently rub it and lick it with the tongue, if the taste has a faint aroma, then it is normal edible oil, and once you feel that there is a sour and bitter smell, it means that it is gutter oil.

The fourth point is burning. We can pour the oil into the pot, turn on high heat, and after boiling for a while, if we find that the color turns black and the edge is cloudy, it is gutter oil.

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

The first point is that you can see whether it is gutter oil by looking at the color of the oil, the second point is that you can smell the gutter oil by looking at the smell of the oil, and the third point is that you can also see whether it is gutter oil by looking at the consistency of the oil.

Gutter oil is some inferior oil, is a long oil made by processing the remaining swill of others, identification is to see whether there is a formal place when the business uses the oil, and this oil is generally lighter in color, relatively inferior, and it is quite astringent to use, so when eating out, you must see whether it is gutter oil, so as not to cause harm to your body.

Gutter oil is a very inferior oil, which is used repeatedly and then re-filtered and re-used. To distinguish gutter oil, we mainly see that if it is a normal edible oil, the color is very transparent, and the gutter oil has been used repeatedly, so its color will be very turbid, and there will be sediment.

Gutter oil is a general term for low-quality oils. Gutter oil contains organic matter and heavy metals, which seriously endanger human health after eating.

Add oil and fresh garlic slices to the anhydrous dish, turn the garlic slices over after ten minutes, if the garlic slices do not change color, it is a good cooking oil, if the garlic has turned green and black or moldy, it is gutter oil.

Waste oil identification method:

1. Look at the color, the normal oil is colorless, transparent, and no precipitation, and the color is yellow and precipitated. Smell the smell, take a drop of oil and put it in the palm of your hand, rub your hands together, and the oil with a peculiar smell when you are hot is gutter oil.

2. Look at the crystals, put the oil in the refrigerated area of the refrigerator for 2 to 4 hours, and the solidification crystals that appear when taken out are gutter oil. Look at the flowability, pour some oil on the glass, if the flow is very slow, it is gutter oil.

3. Looking at the results of Tanlu after high fire, the oil color changes after high fire, and the color becomes thicker and darker, indicating that Rang Shen Belt is gutter oil.

"Gutter oil" is a non-edible oil of extremely poor quality and unhygienic. Once "gutter oil" is consumed, it can destroy people's white blood cells and the mucous membrane of the digestive tract, causing food poisoning and even serious consequences of cancer. Therefore, "gutter oil" is strictly forbidden to be used in the field of edible oil.

However, there are also some people who privately produce and process "gutter oil" and sell it as edible oil to some small restaurants at low prices, which brings great harm to people's body and mind. Therefore, the name "gutter oil" has become synonymous with all kinds of low-quality oils that bring physical harm to people's lives.

Generally, by looking, smelling, tasting, listening, and asking, it is not gutter oil. Gutter oil is dark in color, turbid in oil, sediment, foul, odorous, choking, and odorous in taste. Gutter oil refers to all kinds of inferior oil in life, and the largest is the grease trap of the sewer of large hotels in the city.

If the oil burns normally and makes a "squeak" or "crackle" sound, it is Diliqiaogou oil and cannot be eaten.

Gutter oil is a kind of non-edible oil of very poor quality and unhygienic, which is strictly forbidden to be used in the field of edible oil, which will affect human health.

Gutter oil can be used to produce biodiesel (biofuel), prepare beneficiation agents, produce ethanol and biogas, turn into aviation oil, drilling lubricants.

See. The main purpose of looking at the transparency of the edible oil, usually pure vegetable oil is mostly transparent, this edible oil you can buy and eat with confidence. However, if the cooking oil looks cloudy, it means that the oil must be of faulty quality, or it is simply gutter oil.

The reason for turbidity is that alkali lipids, waxes, impurities and other impurities are mixed into the production process.

In addition, we should also pay attention to the color of the edible oil, the pure oil is colorless, if the pigment in the oil is dissolved in the oil during the production process, then the oil will have some color. At the same time, it is necessary to pay attention to the sediment, pure vegetable oil will not have sediment.

Sniff. By smelling, it can also help us quickly and effectively identify whether it is gutter oil, and it can be said that each edible oil has its own special smell. When smelling, you can put a drop or two of oil on the palm of your hand, then close your hands together and rub them together until your palm is hot, and then smell it carefully.

If the smell is obviously pungent or abnormal, it means that the quality of the oil is wrong. If there is a foul smell, it is likely to be gutter oil, and it is best to avoid buying this oil as much as possible.

Normally, the pure cooking oil aroma is very fragrant, and there will not be any peculiar smell in it, but if there is a foul smell or mineral oil smell, it means that there is a quality problem.

Listen. In ordinary life, you can also identify whether it is gutter oil by listening, take a drop or two of oil at the bottom of the oil layer and apply it to a flammable piece of paper, and then ignite it with fire. At this time, you can listen to its sound, if the combustion is normal and there is no sound, it means that it is a qualified product.

If the combustion is not normal and the "squeak" sound is also emitted, it means that the moisture in it exceeds the standard and is an unqualified edible oil. If there is a "crackling" sound during combustion, it means that the content in the oil is seriously exceeded.

Here's how:1. Look at the transparency of the oil, the high-quality oil is clear, and the low-quality oil contains impurities.

2. Looking at the ingredient list of oil, high-quality oil with high content of unsaturated fatty acids and vitamin E.

3. Rub the oil drops in the palm of your hand, the taste of the gutter oil is impure and smelly.

4. Put the newly bought oil on the popsicle and quickly solidify it as gutter oil.

5. When buying edible oil, it is best to go to a regular supermarket to buy edible oil produced by regular manufacturers.

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

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 smellEach oil has its own unique smell. You can put a drop or two of oil on the palm of your hand, rub your hands together, and smell it carefully when it is 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.

5. 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.

In addition, the relationship between the concentration of metal ions and the conductivity of the oil can be used to determine the amount of metal ions in the oil by measuring the conductivity of the oil. Many experiments have shown that the conductivity of water oil is 5 to 7 times that of first-class edible oil, so that water oil can be accurately identified.

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

1. It can usually be distinguished by looking, smelling or asking. When you look at it, you should look at its transparency, pure vegetable oil is usually transparent, if it is gutter oil, because the gutter oil is mixed with other substances with impurities in the production, its transparency will decrease, and there will be impurities.

2. When smelling, you can first drop one or two drops of oil in the palm of your hand, and then rub your hands until you are hot and smell the smell.

3. You can identify by asking the merchant. Once gutter oil enters the market, consumers should learn how to distinguish gutter oil when buying edible oil.