1, taste: if the oil taste contains spicy taste, it is probably edible oil refined from waste oil;
2, odor identification: take a small amount of cooking oil in the palm, rub it back and forth with the palm, if there is odor, it is likely to be mixed with waste oil;
3, put in the refrigerator: put the oil in the refrigerator at 5 to 8 degrees Celsius. After 2 to 4 hours, it will solidify and crystallize, which is likely to be waste oil. Because animal oil with considerable oil content is added to waste oil.
4. High-fire: If the oil color changes after high-fire cooking, and the color becomes thick and black, it means that it is probably gutter oil, because the small particles contained in gutter oil are easy to change color after burning.
5. Look at the oil transparency. Authentic cooking oil is clear and transparent. When you put a note on one side, you can clearly see the words on the opposite side in the light from the opposite side, while most of the gutter oil is turbid. The more you mix it, the more turbid the oil is.
However, the specific truth or falsehood still needs the efforts of the state regulatory authorities. Because people are counterfeit, it is relatively easy for us to distinguish them ourselves. If people are shoddy, it will be more difficult to distinguish them! For example, camellia blended oil and olive blended oil, how do you know the ratio of camellia to olive oil? Foreign countries should indicate the proportion of this bottle sticker, but there is no requirement at home now. It can be said that all manufacturers are playing this edge ball! Therefore, buying oil, buying pure oil, and choosing different edible oils suitable for your body according to the nutrition you need, at least this layer of concern is eliminated! Others, such as whether or not genetically modified raw materials are prepared, or whether or not genetically modified materials are prepared, should be clearly stated in a conspicuous place, but now not all manufacturers have done it in place, either without specifying it, or some of the blended oils containing genetically modified materials are simply not marked, or the writing is very inconspicuous. Moreover, there are many green foods and certifications, which are all certificates of third-party certification that require money. Although they are not necessarily bad, you know more about them yourself and know which certifications are mandatory by the state and certified by relevant state departments. Certified by the government regulatory authorities, it is relatively safer and more practical, such as quality certification.
Said a lot, I hope it will help you! ! ! thank you