A chopstick can be used to measure the quality of the oil
reporter Jiao Jian Wang Chuan
opens seven things: rice, oil, salt, sauce, vinegar and tea. The quality of these things, which are necessary for daily life, is attracting more and more attention from the public. The Xinbao laboratory is natural to think of the citizens, the urgent people, the opportunity to provide the citizens with a simple and easy method of testing, so that you can also be an expert at home. This time the Xinbao lab will teach you a simple way to detect sesame oil. You can do the tests with chopsticks and clear water at home.
[b]A people use the smell and smell to distinguish the good or bad [/b]
oil as the indispensable condiment on the table, the fragrance is unique and nutritious. However, local media have also reported that many people are using other cheap oils to pretend to be profiteering. This kind of sesame oil is not only difficult to distinguish from color and smell, but also harmful to human body for a long time.
before introducing this method, the reporter first got to know what the citizens are using to identify their own sesame oil is good or bad.
"honestly, this is not very clear, but I know more about brand, so I usually buy brand of sesame oil directly. The price may be high, but I feel so relieved. " Ms. Cheng, who is shopping at Jia Shi supermarket, told reporters that her family used "Choi" brand of sesame oil, which is used by many relatives and friends. She told reporters that although the bulk of the aromatic oil in the ordinary farmers market is cheap, some half a catty is only a few yuan, but it may not even cost enough to eat.
"buy sesame oil must look at the color first. I will not buy it if it gets dark." Mr. Wang, who often makes egg soup for his girlfriend, says he usually drops drops of sesame oil in his soup. "I have bought cheap oil in the street market, the color is dark brown, I do not care, who knows at home for a long time, the color is basically black, I think it is not right, who dare to drink?"
Mr. Shaw, who lives in the District of Jinhu Road, said that, through acquaintances, he had seen someone using salad oil and sesame oil to blend fake oil. "I had taught me a way, and it was quite accurate." He said that after buying sesame oil, you can put a drop on your thumb and rub it with your index finger. You will smell the taste on your fingertips. "If it is blended with sesame oil essence, because it is easy to volatilize, there will be a strange smell at the beginning, and it will not taste after a while."
[b]B new method: chopsticks add water [/b]
recently, CCTV science and education channel, 2011 "I love the invention" program fourteenth, introduced Lv Changfu, he is the deputy director of the Chongqing Quality Supervision Bureau retired, to show you the quick test method of chopsticks with water.
production of inferior oil such as black cotton seed oil, such as black cotton seed oil, the intermolecular binding force is larger than the fragrant oil, through this and combined in the first line of decades of counterfeiting experience, Lv Changfu found a large number of experiments to find a way to distinguish the advantages and disadvantages. Using ordinary chopsticks at home, dip the chopsticks into the sesame oil bottle and dip in the sesame oil. If it is high quality oil, dripping into the water will be instant scattered, if the inferior oil drops on the water, oil drops on the water will not spread, always keep a circular oil drop shape, very obvious.
this method is used because the surface tension of water is relatively large, the surface tension of sesame oil is relatively small, and the greater the diffusion of water into the water is. However, the inferior flavor oil itself has great tension. After entering the water, the water can not pull the oil film away, so the oil beads float on the water.
there are several points for attention for this test method. First is the water container must be clean, no stains, especially oil; secondly, the surface of the water must remain calm, do not have sloshing; third, when using chopsticks to drop oil on the water, do not be too high, or the inferior oil will spread because of the effect of gravity.
in the program, Lv Changfu tested eight kinds of oil. The results showed that there were three kinds of qualified and five kinds of disqualification. After the Chongqing Quality Inspection Institute, the conclusion was consistent with this method.
[b]C pick seven bottles of different brands of oil to do the experiment [/b]
after understanding this new method, the reporter bought the Cui brand small polish oil, the wife lozhi sesame oil, the Jinsheng boutique mill oil, the chef Jen sesame oil from the Jia shicke supermarket. Oil, Jilong mountain old squeeze square gold standard blended with fragrant sesame oil and the king Ji oil room made by Wang Ji oil house in the market, a total of seven different brands of fragrant oil. The following is the main information in the bottle package:
No. 1, Cui brand small Polish oil, the net content of 218 milliliters, the price 14.5 yuan, and the list of ingredients 100%. Selected quality sesame, quality grade 1, production process water generation method (small stone grinding process), origin Weifang.
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No. two and wife lozhi sesame oil. The net content is 230 milliliters, the price is 14.5 yuan, the raw sesame, processing technology is pressed, the quality grade is first class, the origin is Zhumadian, Henan.
three, Jinsheng fine grinding sesame oil, net content of 170 ml, the price of 8.8 yuan, ingredients sesame, food origin Chaohu, Anhui. This bottle is the lowest of the seven kinds of oil.
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four, chef sesame oil, 200 milliliter of net content, 10.8 yuan, batching sesame oil, processing technology press, grade sesame oil first grade, Qingdao of origin.
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No. five, green Fu brand millstone oil, 218 milliliter of net content, 10 yuan, the list of ingredients is 100% selection of high quality sesame, quality grade one, production process water substitute (small stone grinding process), producing Qingdao.
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No. six, Jilong mountain old squeeze square gold standard and fragrant sesame oil, the net content of 450 ml, the price 12 yuan, the ingredients for high quality sesame oil, vegetable oil, producing Anhui and county. This bottle of sesame oil is also the only one of the seven kinds of sesame oil with the word "harmonious".
seven, Wang Ji special grade sesame oil, the net content of 250 ml, the price of 9 yuan, raw materials 100% sesame, the origin of Shinan District, the new farmers market.
[b]D prepared the oil through the experiment six bottles of [/b]
, and the reporter also found seven disposable chopsticks and clean ceramic water cups. The experiment was carried out after the tap water was picked up.
follows the experimental method. Reporters use seven chopsticks to dip sesame oil and then gently drop it on the water surface. Through the test, indeed, as the program introduced, there are six bottles of sesame oil dripping quickly into the water. After careful observation, the oil droplet is turned into an oil film on the water surface. But only chicken cage mountain old squeeze square gold standard oil and sesame oil, oil drops after the water drops in the shape of oil beads, and then the oil beads slowly spread, but not completely dispersed.
seven bottles of oil six bottles pass through the test results, you can see that the market sales of oil is still more reassuring, and because the old Jilong mill Golden Square golden standard and fragrant sesame oil itself ingredients are not pure, so it has become a special case in the test, which can also let the public understand the test. The situation.