Identification: Once "gutter oil" enters the market, consumers should learn sensory identification. According to experience, edible vegetable oil can be identified by looking, smelling, tasting, listening and asking.
Look: Look at transparency. Pure vegetable oil is transparent. In the production process, due to the mixing of alkaline grease, wax and impurities, the transparency will be reduced. Look at the color, pure oil is colorless, in the production process, because the pigment in the oil dissolves in the oil, the oil will have color; Look at the sediment, its main component is impurities;
Smell: Each oil has its own unique smell. You can put a drop or two of oil on your palm, rub your hands together and smell it carefully while it is hot. Oils with peculiar smell indicate quality problems, and those with mineral oil smell cannot be bought;
Taste: Take a drop of oil and taste it. Oils with sour taste are unqualified products, and oils with peculiar smell may be "gutter oil";
Listen: Take one or two drops of oil from the bottom of the reservoir, spread it on flammable paper, light it and listen to its sound. Products with normal combustion and no noise are qualified products; If the combustion is abnormal, it will make a "squeaky" sound, indicating that the water content exceeds the standard and it is an unqualified product; The "beep" explosion when burning indicates that the water content of the oil is seriously exceeding the standard and must not be purchased;
Q: Ask the merchant about the purchase channel, ask for the purchase invoice or check the sampling test report of the local food hygiene supervision department if necessary.
Extended data:
Hazards of waste oil:
For some people, eating gutter oil can cause dizziness, fatigue, even allergic reactions, and even serious signs of poisoning. The harm caused by gutter oil is still very serious and needs our attention. Therefore, people who have various discomfort symptoms after using some unknown oil sources should go to the hospital in time to avoid food poisoning.
Baidu encyclopedia-ditch