1, water identification

Dip a drop of fragrant oil in clear water with chopsticks, and the pure sesame oil will appear colorless and transparent fine oil flowers, and then condense into several tiny oil beads. The flowers adulterated with sesame oil are small and thick, and it is not easy to spread.

2. Color recognition

Fill the oil extractor with sesame oil and pour it into the oil cylinder from a height. If the spilled oil flower is light yellow, it means that sesame oil is mixed with rapeseed oil, because pure sesame oil is copper red, clear and fragrant. Generally speaking, machine pressed sesame oil is lighter than small ground sesame oil.

3. Identification by freezing method

Put sesame oil in the refrigerator, take it out and put it at room temperature. Pure sesame oil will melt quickly. Inferior sesame oil melts slowly, and there will be obvious hard cores in the melting stage.

4, heating identification

Heat sesame oil in a pot. If it turns white after heating, it means lard is mixed. If it becomes clear after heating, it means that rapeseed oil is added; If it is turbid after heating, it means that after adding rice soup, sediment will appear soon.

5. Smell recognition

Rub a little oil in your hand, and the pure fragrance is sesame oil; Soybean oil can be mixed with bean smell; Spicy, it is mixed with rapeseed oil.

6. Vibration method

Take a bottle of sesame oil and shake it gently. If the bubbles are transparent, they will disappear quickly, usually pure sesame oil. If the bubbles are opaque, yellow and slowly disappear, it is inferior sesame oil.

7. Taste method

Pure sesame oil has a sticky feeling in the mouth and tastes a little bitter. Fake sesame oil has no astringency and light taste.