Select the edible oil to see and refine degree

Select the edible oil to see and refine degree
Assistant Researcher of research institute of environmental medicine of military hygiene of academy of medical sciences Chen WeiQiang
Medias reported a few days ago, pressed and was mixed with " light petrol " in the peanut oil Made out peanut oil with solvent oil, it has endangered even exceeded oil of underground drainage. People would like to know that which is better and which is worse to press and extract oil and soak and produce oil on earth. In fact - -
The edible oil is the indispensable nutrient component in our daily life, can offer energy for organism after it oxidizes and decomposes, and can offer nutrient components such as essential fatty acid, lipid-soluble vitamin,etc. for organism, so it is very important to the health to use the oil rationally. Various edible oil products have appeared in our country in recent years, like classical soya bean oil, peanut oil, salad oil, plumule oil of emerging corn, rice bran oil, sunflower seed oil, grain tempered oil,etc., there are advanced olive oil, tea-seed oil,etc. even more. But ordinary people seem at a loss as to what to do in the face of the forest forest always total edible oil products. The edible oil of our country basically adopts and presses law or infusion law to produce, then which kind of oil on earth benefits the health even more?
Make the quality that the craft can't determine the oil
Press and extract oil and soak the main difference that produces oil and lie in it makes difference of crafts: It is that physics presses the law to press the preparation method of extracting oil, and it is a chemical infusion law to soak and produce oil.
It is through breaking, steaming frying, pushing to raw materials that physics presses the law, let the oil be isolated from oil directly. Can keep raw materials original and nutritious to extract oil while adopting the pigeonholing of physical method, the quality of the oil is more pure. But the producing oil rate is low, utilize low intensity to raw materials, the process cost is relatively high. It is reported, press and make the oil craft and is used mainly in top-grade oil such as peanut oil, olive oil, nut oil, sesame oil at home at present.
Chemical infusion to adopt a certain solvent go on the high temperature draw and then after fully soaking raw materials in law, become readymade oil after through defat, coming unstuck, dehydrating, decolorizing, taking off discreditedly, taking off the acid. The legal system oil of infusion has producing oil rate high, process cost low grade advantages, are often used for producing soya bean oil, corn oil, sunflower seed oil. So long as conform with the national standard, the edible oil produced with infusion law, the residues of its chemical composition are very low, there will not be any influence.
In fact, factor influencing edible oil quality production technology, but concise intensity of oil and according to relevant to standardize operation strictly in the production process. It is that two kinds of different oil make and fetch the craft, should not be regarded as the main basis of the edible oil of choice to press the law and infusion law. Because process press the intersection of infusion and this process and refine the crude oil dealt with only ' Mao are oily) ,Contain more free fatty acid, colloid, coloured material,etc., can not be eaten directly, must refine into deal with and a series of processing, make it become the intersection of color and relatively shallow, refined oil clarified, could reach the standard of the oil at all levels and go on the market and sell. So, no matter soak and produce oil and press and extract oil, so long as accord with edible oil quality criteria and sanitary standard of our country, so far as all safe, can rest assured to eat.
The relevant standard of edible oil of our country requires the bright mode of production of factory's trade mark at present, for ensure right of being in know of consumer mainly, let consumer choose according to their own taste, in order to meet different demands.
Can follow three principles while choosing the edible oil
Have understood after pressing and extracting oil and soaking the difference that produces oil, we should choose the suitable edible oil products according to one's own need. We should follow choice and use that the following several principle carry on the edible oil:
We must buy the edible oil of the health hygiene that the regular producer produce in health principle, do not buy oil and edible oil and products of unknown origin in bulk.
A lot of edible oil manufacturers at present of health care principle have introduced various health care edible oil products, edible oil substantially as adding health care compositions such as steroid alcohol of corn, vitamin A, marine alga oil,etc., there is edible oil produced with the oil plant rich in polyunsaturated fatty acid directly, such as sunflower seed oil, peanut oil, sesame oil, corn plumule oil,etc.. We can until own situation choose some to child and old man have good for brain, benefit intelligence, regulate fat of blood the intersection of health care and edible oil of function.
Save the principle while choosing the edible oil, it is unnecessary for us to choose those advanced products, like olive oil, pure peanut oil,etc., general soya bean oil, tempered oil of grain,etc. can well meet daily nutrition's needs. Polyunsaturated fatty acid,etc. contained in the advanced products composition, we can absorb by other routes (such as the nut food) . Moreover, according to the nutritive resident meal pagoda of our country that learns to be made of China, the edible oil that we take in normally every day should be controlled in 25~30 grams, it will cause the bad health effect to absorb too much.
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