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Anonymous users2024-02-08Acid value, also known as acid value, is the name of the same quantity in different literature, different industries, and different situations. This amount is mainly used to control the acidity of the product in the industry, and the main product is macromolecular oil. The standard used is 1g of analyte, which is titrated with KOH after treatment to make a solution, phenolphthalein as an indicator (or potentiometric titration), and the KOH concentration is generally as follows.
The acid value in instant noodles is mainly based on the residual fat in the process of frying dough and the fat used in the sauce packet to characterize the influence of processing and storage conditions on the product. High acid values can cause gastrointestinal upset, diarrhea or liver damage.
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Anonymous users2024-02-07In chemistry, acid value (also known as neutralization value, acid number, acidity) indicates the number of milligrams of potassium hydroxide (koh) required to neutralize 1 gram of a chemical. Acid value is a measure of the number of free carboxylic acid groups in a compound (e.g., fatty acids) or mixture. A typical measurement procedure is to dissolve a sample of known weight in an organic solvent, titrate it with a potassium hydroxide solution of known concentration, and use phenolphthalein solution as a color indicator.
The acid value can be used as an indicator of the degree of deterioration of the oil.
The amount of free fatty acids in the oil is neutralized with KOH, and the amount of free fatty acids can be calculated from the consumption of KOH standard solution, and the reaction formula is as follows: RCOOH+KOH——-RCOOK+H2O[2].
The acid value of fresh and pure oils and fats coveted from normal raw materials is very low, not more than 2 3, and the acid value of edible oils and fats should not be higher than 5.
Acid value is an indicator of the content of free fatty acids in fats, which are slowly hydrolyzed due to microorganisms, enzymes and heat during long-term storage, resulting in the production of free fatty acids. Whereas, the quality of fat is related to the content of free fatty acids in it. Acid value is commonly used as one of the criteria.
Under the conditions of fat production, the acid value can be used as an indicator of the degree of hydrolysis, and under the condition of its preservation, it can be used as an indicator of rancidity. The lower the acid value, the better the quality of the oil, the better the freshness and refinement. [3]
Its size is not only an important indicator of the quality of crude oil and essential oils, but also the basis for calculating the main technical and economic index of acid value refining consumption ratio. The crude oil acid value is the basis for calculating the amount of alkali added and the concentration of alkali solution in the process of alkali refining operation in the refinery workshop. [4]
In general, a slight increase in acid value and peroxide value will not harm human health. However, if the acid value is too high, it can cause gastrointestinal upset, diarrhea and damage to the liver.
The size of the acid value of oils and fats is related to the raw materials for making oils, the technology of oil preparation and processing, the storage and transportation methods and storage conditions of oils and fats. For example, mature oilseeds have a smaller acid value for oil production than immature or germinating seeds.
Triglycerides are decomposed by heat or lipidase to produce free fatty acids during the oil making process, so that the acid value in the oil increases. During storage, oils and fats are broken down into free fatty acids due to the action of moisture, temperature, light, lipase and other factors. In the oil, the acid value increases, and the storage stability decreases.
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Anonymous users2024-02-06Eating instant noodles often is harmful to your health, because instant noodles have preservatives in them, and eating too much is not good for your stomach.
1. Oil: In order to prolong the shelf life, most varieties of instant noodles are fried in oil, and the fat becomes oxidized lipid after oxidation. It accumulates in blood vessels or other organs, forming aging phenomena, accelerating the aging rate of people, causing arteriosclerosis, and easily leading to cerebral hemorrhage, heart disease, kidney disease and other diseases.
2. Antioxidants: Instant noodles from the production to the consumer, a short time of one or two months, a long time of one or two years, the added antioxidants and other chemicals due to long-term storage, affected by the environment, has been slowly deteriorated, after eating to the human body has a certain harm.
3., Salt: A pack of instant noodles contains about 6 grams of salt, and a person's daily salt intake is 6 grams, so the salt content of instant noodles is obviously high. Eating instant noodles regularly can lead to high blood pressure and damage to the kidneys due to excessive salt intake.
4. Phosphate: Phosphate additives can improve the taste of instant noodles. However, too much phosphorus intake in the human body will make the calcium in the body unable to fully absorb and utilize, which can easily cause fractures, tooth loss and bone deformation.
Instant noodles can be made noble
I have a history of eating instant noodles You can try it It tastes very good First unpack the instant noodles and put them in the pot, (* the pot is best to use a small pot like boiled milk), pour the seasonings on the surface of the noodles, and then pour boiling water on top of those seasonings, (* to use boiling water, the amount is not over the dough), and then boil over medium heat, after the water boils, change to low heat, the length of time depends on the taste of everyone eats, if you eat somersault, cook for a longer time on low heat, and finally turn off the heat, put an appropriate amount of vinegar in the noodle soup, cover the lid, and wait for a while(Reason: Put some vinegar to taste better, cover the lid, is to let the noodles absorb the aroma of vinegar, if you don't have a lid, the vinegar flavor will volatilize,) mix well and eat. The time to cook noodles depends on your preference, and the time is up to you
It should be, but the chances are very small unless you eat it for a few years or decades, and you have to eat it every day Because fried products (most of them are 2 hand oils nowadays) can cause gallstones If you don't eat instant noodles like me above, you don't have to worry about eating too many gallstones.
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Instant noodles are one of the top 10 junk foods, do you say it is harmful Eating instant noodles often will cause nutritional deficiencies Instant noodles are a kind of food that office workers like, it can be used as a snack, supper, and a meal, and it is easy to eat, which is very suitable for busy office workers. In particular, many men do not have as many concerns about their body as women, and they are so-so about their diet, and instant noodles are their "darlings", and they often put a few packets in their desks. However, men who eat instant noodles a lot, you know, it is convenient to eat them, but how much trouble will it bring you? >>>More