How can balm oil quickly identify its true and false?
1, color discrimination method: pure sesame oil is red or orange red, press sesame oil than small ground sesame oil color light, sesame oil mixed with rapeseed oil color deep yellow, mixed with cottonseed oil color deep red.
2, water test method: use chopsticks dipped in a drop of sesame oil drops to calm cool water surface, pure sesame oil will appear colorless transparent thin oil. Adulterated sesame oil is small and thick, and not easy to spread. It is proved that the water temperature plays a decisive role in distinguishing pure sesame oil from mixed sesame oil. The warm water spreads out, but the shapes and sizes differ.
3, smell method: small ground sesame oil fragrance mellow, rich, unique, such as mixed with peanut oil, soybean oil, refined oil, rapeseed oil and so on is not only bad flavor, but also have peanut, bean smell and other odors. Part of sesame oil is mixed by edible essence, the smell is poor.
Consumers in the purchase of sesame oil can also be identified from the following aspects:
A look at color: pure sesame oil is light red or red with yellow, if mixed with other oil, color is different. Rapeseed oil is dark yellow, mixed with cottonseed oil is black red. To mix the product that has other vegetable oil, also can use water to try a method: dip a drop of sesame oil with chopsticks to drop to calm water surface, pure sesame oil will appear colorless and transparent thin film big oilflower, adulterated will appear thicker and smaller oilflower.
2 see transparency: general quality of sesame oil transparency is good, no turbidity.
Three to see whether there is no precipitation: good quality without precipitation and suspension, viscosity.
Four see whether there is stratification phenomenon: sesame oil is quite sensitive to temperature, so at a lower temperature may be stratified. If there is stratification at room temperature and viscosity does not increase significantly at 0℃, (national standard in freezing test at 5.5 ℃ storage temperature, non-freezing is qualified) non-coagulation is likely to be adulterated mixed oil. If there is no stratification at any temperature, the sesame oil added anti-freeze additives.