Sesame oil production and identification
A sesame oil frying method
(1) Screening. First use a fine sieve to remove the dust and filth in the sesame seeds, and then dust and immature seeds.
(2) rinse. Fill enough water with a plate or jar, pour the sesame seeds, stir for 10-15 minutes, remove the sundries after floating on the water, remove the sesame, remove it on a dense-eye sieve, and soak for at least half an hour.
(3) Fried sesame seeds. Place the washed sesame in a frying pan. At the beginning, because of the excess moisture, the fire must be swift, and should be evenly disturbed. After a large amount of steam disappears from the pot, change it to a small fire. Fried sesame seeds have been crushed by hand after the heart was red, immediately spilled into the sesame weight of 2.0% to 2.5% of the cold water, fry while pan.
(4) Blowing smoke. The temperature of the freshly-discharged sesame seeds was very high. Although the temperature dropped to about 150°C after spraying very little water, cooling and cooling were still required. Otherwise, the sesame seeds would be burnt and the quality of the sesame oil would be affected. You can put the sesame pan on the pan, and drop the sesame yang into the pan from a high place. At the same time, blow the cool breeze from the side to blow off the smoke, lower the temperature, blow the net sesame morsel, and get a more pure cooked sesame.
Note: It is better to fry the seeds until the coffee is brown (observe the color of the kernel and pinch the skin by hand). There is a burst phenomenon. When the seeds are fried, keep two small fires. In the middle of the fire, the pressing temperature is 140-150"C and the moisture is 1-1.2%.
Second, the comparison of small sesame oil sesame oil and traditional crafts sesame oil
The traditional process of producing sesame oil is to fry the sesame seeds, grind them into pulp with a stone mill, soak in hot water, stir and shake, and use the buoyancy of water to float the sesame oil. The traditional sesame oil production process takes time and effort, and has a long cycle. Because it was not produced on site, there are now unscrupulous traders selling sesame oil blended with sesame oil. Due to the low price of fake sesame oil, there has been no market for invading traditional sesame oil production.
Third, the authenticity of the existing identification
1) Identify with water: Use a pair of chopsticks to dipped a drop of sesame oil onto the surface of the clear water. The pure sesame oil will appear as a colorless, transparent thin oily flower, which will then be condensed into a number of tiny oil beads. The oil of adulterated sesame oil is small and thick and does not spread easily;
2) Color identification: Fill the sesame oil with sesame oil, then pour it from the height into the oil tank. If the oil splash is light yellow, it means that the sesame oil is mixed with rapeseed oil because the pure sesame oil is Red copper, clear, fragrant smell, in general, the sesame oil is lighter than the small sesame oil;
3), using the freezing method to identify: the sesame oil in the refrigerator, remove and put at room temperature, pure sesame oil will quickly dissolve the whole. Poor sesame oil dissolves slowly, and a clear hard heart appears at the first stage of melting. ;
4) Heating identification: Put the sesame oil into the pot for heating. If it is heated, it turns white, indicating that it is adulterated with lard; if it becomes very clear after heating, it means that it is blended with rapeseed oil; Into rice soup, soon there will be a precipitate;
5) Odor recognition: Take a little oil and rub it in your hands. The pure fragrance is sesame oil. If you have glutinous rice beans, it may be mixed with soybean oil. If you have spicy flavor, it is mixed with rapeseed oil.
6) Concussive method: Take a bottle of sesame oil and gently oscillate. If the bubbles are transparent and quickly disappear, it is generally pure sesame oil. If the bubbles are opaque, yellow, and disappear slowly, it is a poor sesame oil.
7), taste method: Pure sesame oil to drink in the mouth, there is a sense of thick sticky, taste a bit of a bitter, fake sesame oil to drink no scent in the mouth and feel astringent, taste is light.
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