Now the country has no way to identify waste oil. There is no way to judge, this is called gutter oil and that is not called, so it is impossible to judge gutter oil now. Oil without nutrients is already bad oil. Inferior oil can't be distinguished by naked eyes, but oil that can't be washed away by hot water can be judged as inferior oil by its greasy degree.

1. Look at the color. Over-oil is transparent, while waste oil has many chemical components, which will be turbid and opaque, and there may be precipitation at the bottom of the bottle. This kind of inferior oil can be seen in the wholesale market of bulk oil, and small restaurants on the street may also use inferior oil.

2. smell the smell. Oil will have the taste of oil itself, for example, peanut oil will have the taste of peanuts; Olive oil will smell like olives. Gutter oil does not have the proper fragrance of the oil itself. If you smell it carefully, you can smell a little sour and a strange smell of chemical components.

3. Taste it. Usually when you buy oil, you can tell by the color and smell. But after buying the oil, the chef will dip a drop of oil in his palm with chopsticks, rub it gently and lick a little oil with the tip of his tongue. Normal oil will taste delicious. For example, peanut oil tastes like peanuts, but gutter oil tastes sour and bitter. These three simple methods are the most commonly used in the whole chef industry, and consumers can also use these three methods to identify them. Don't eat oil that doesn't feel good.

4. Finished eating. The oil used in restaurants has been tampered with and it is difficult to identify. However, after eating the dishes made from waste oil, the stomach will swell, the stomach will be uncomfortable, and indigestion will occur. This method may not be called a method, because you have to eat it to have an uncomfortable reaction.