Color discrimination method: pure sesame oil is red or orange red, machine sesame oil is lighter than small sesame oil, sesame oil is dark yellow when mixed with rapeseed oil, and dark red when mixed with cottonseed oil. Binzhou City Shermark Sesame Oil Technology Co.,Ltd. specializes in producing 100% pure red sesame oil.
Water test method: use a chopstick to drip a drop of sesame oil onto a calm, cool water surface. Pure sesame oil will show a thin, large oily flower with no color and transparency. Oils mixed with sesame oil are small and thick, and are not easily diffused.  It has been verified that this method distinguishes pure sesame oil and blends sesame oil. The water temperature plays a decisive role. The cold water is not scattered and cannot be distinguished. Both warm water and water are scattered, but the shape and size of the oil flower are inconsistent.
Sniffing method: Small grinding sesame oil is mellow, rich and unique. If it is blended with peanut oil, soybean oil, refined oil, rapeseed oil, etc., it will not only have poor aroma, but also have other odors such as peanuts and soybean meal. Some sesame oils are blended with food flavors and have a poor sense of smell.
Consumers can also identify the following aspects when purchasing sesame oil:
A look at the color: pure sesame oil is light red or red with yellow, if mixed with other oil, the color is different. The rapeseed oil is dark yellow and the cottonseed oil is black and red. For products with other vegetable oils, the water test method can also be used: a drop of sesame oil is dropped onto the calm water with chopsticks, and the pure sesame oil will show a thin, large oily flower with no color and transparency. Smaller oily flowers.
Second, look at transparency: generally good quality sesame oil has good transparency and no turbidity.
Third, see if there is any sediment: good quality, no precipitation and suspended matter, and low viscosity.
Fourth, see if there is stratification: sesame oil is quite sensitive to temperature, so it is possible to stratify at lower temperatures. If there is stratification at normal temperature and there is no significant increase in viscosity at 0 °C (the national standard is 5.5 when the freezing test is performed at zero degrees Celsius, it is not allowed to freeze). If it is not condensed, it is likely to be adulterated mixed oil. If there is no delamination at any temperature, it means that antifreeze additive is added to the sesame oil.
Fifth investigations: It is necessary to carefully check the trademarks, pay attention to the shelf life and the ex-factory period, and have no special name for the factory name, factory address or quality standard. Pay particular attention to the ingredients or ingredients (the words are specially formulated in lower case).
Sixth look at the price: refer to the price of sesame, generally 2.5 to 3 pounds of sesame seeds a pound of sesame oil, the price is too low is the fake sesame oil blended with flavor!