Acidity regulator (citric acid)
Citric acid is an important organic acid, also known as tannic acid, a colorless crystal, often containing a molecule of crystalline water, odorless, strong sour, and soluble in water. The calcium salt is more soluble in cold water than hot water, and this property is often used to identify and isolate citric acid. Anhydrous citric acid can be obtained by controlling the temperature at the time of crystallization. In industry, food industry, cosmetics industry, etc. have a lot of uses. effect Citric acid is mainly used as a sour agent, a solubilizer, a buffering agent, an antioxidant, a mite deodorant, a flavor enhancer, a gelling agent, a toner, and the like. In addition, citric acid has the effects of inhibiting bacteria, protecting color, improving flavor, and promoting sucrose conversion. Citric acid also has a chelating effect that can remove certain harmful metals. Citric acid can prevent the oxidation caused by enzyme catalysis and metal catalysis, thus preventing discoloration and discoloration of quick-frozen fruits. Natural presence Natural citric acid is widely distributed in nature. Natural citric acid exists in the bones, muscles, and blood of fruits and animals such as lemons, oranges, and pineapples. Artificially synthesized citric acid is produced by fermenting sugar-containing substances such as sugar, molasses, starch, and grapes, and can be classified into two kinds of anhydrous and hydrated ones. Pure citric acid is a colorless, transparent crystalline or white powder that is odorless and has an attractive sour taste. Many kinds of fruits and vegetables, especially citrus fruits contain more citric acid, especially lemon and lime - they contain a lot of citric acid, and after drying, the content can reach 8% (in the fruit juice content About 47 g/L [3]). In Citrus fruits, the content of citric acid is between 0.005 mol/L for orange and grape and 0.30 mol/L for lemon and lime. This content varies with the growth of different cultivars and plants. application In terms of food additives, it is mainly used for refreshing beverages and pickled products such as carbonated drinks, fruit juice drinks, and lactic acid drinks, and the demand varies depending on the seasonal climate. Citric acid accounts for about 2/3 of the total consumption of sour agents. Adding citric acid to canned fruit can maintain or improve the flavor of the collection, increase the acidity (lower the pH) of the fruit cans when the acidity is low, weaken the heat resistance of the microorganisms and inhibit their growth, and prevent the acidity from decreasing. Canned jars of fruit can often occur and are destroyed. The addition of citric acid as a sour agent in candies facilitates the coordination of fruitiness. The use of citric acid in gelatin foods such as sauces and jellies can effectively reduce the negative charge of pectin, thus allowing hydrogen bonding between pectin molecules to gel. In the processing of canned vegetables, some vegetables are alkaline reactions, using citric acid as a pH adjuster, not only can play a role in flavor, but also maintain its quality. The chelating effect of citric acid and the adjustment of its pH-value characteristics can increase the performance of antioxidants in the processing of quick-frozen foods, inhibit the activity of enzymes, and prolong the shelf life of foods. Fermentation mechanism In 1940, Krebs proposed the tricarboxylic cycle theory, and the fermentation mechanism of citric acid was gradually recognized by people. It has been proved that the process of converting sugar from pyruvic acid into pyruvic acid in the biochemical process of producing citric acid from the raw material of the saccharin is the same as that of alcoholic fermentation, that is, glycolysis is carried out through the EM pathway (hexose diphosphate pathway). Pyruvate is then further oxidatively decarboxylated to acetyl-CoA, and oxaloacetate formed by the acetyl-CoA and pyruvate carboxylation is condensed to citric acid and enters the tricarboxylic cycle pathway. Citric acid is an intermediate product in the metabolic process. In the fermentation process, when the activity of aconitine hydratase and isocitrate dehydrogenase in the microorganism is very low, and the activity of citrate synthase is high, it is beneficial to the large accumulation of citric acid. The main purpose For the food industry Because citric acid has a mild and refreshing sour taste, it is commonly used in the manufacture of various beverages, soft drinks, wines, candy, snacks, biscuits, canned fruit juices, and dairy products. In all organic acid markets, citric acid has a market share of more than 70%, and flavoring agents can also be used as antioxidants for edible oils. At the same time improve the sensory properties of food, enhance appetite and promote the body's digestion and absorption of calcium and phosphorus. Anhydrous citric acid is used in large quantities for solid beverages Salts of citric acid, such as calcium citrate and iron citrate, are fortifiers that require the addition of calcium and iron ions in certain foods. Citric acid esters, such as triethyl citrate, can be used as non-toxic plasticizers to make plastic film for food packaging. It is a sour agent and preservative in the beverage and food industry. For chemical and textile industries Citric acid can be used for chemical analysis reagents in chemical technology, used as experimental reagents, chromatographic analysis reagents and biochemical reagents; as a complexing agent, masking agent; used to prepare buffer solutions. The use of citric acid or citrates as builders can improve the performance of washing products, can quickly precipitate metal ions, prevent contaminants from reattaching to the fabric, maintain the necessary alkalinity for washing, and disperse and suspend dirt and ash; It is an excellent chelating agent to improve the performance of surfactants; it can be used as an agent for testing acid resistance of architectural ceramic tiles. Formaldehyde contamination of clothing is a very sensitive issue. Citric acid and modified citric acid can be used as a formaldehyde-free crease-preventing finishing agent for crease-resistant finishing of cotton fabrics. Not only is the anti-wrinkle effect good, but also the cost is low. For environmental protection Citric acid-sodium citrate buffer is used for flue gas desulfurization. China is rich in coal resources and constitutes a major part of energy. However, it has been lacking an effective flue gas desulphurization process, leading to severe atmospheric SO2 pollution. Studying effective desulfurization processes is a matter of urgency. The citric acid-sodium citrate buffer solution is an extremely desulfurizing absorbent because of its low vapor pressure, non-toxicity, stable chemical properties, and high SO2 absorption rate. For livestock production The addition of citric acid to the piglet diet can wean the piglet earlier, increase the feed utilization rate by 5% to 10%, and increase the litter size of the sow. Adding 1% to 2% citric acid to the growth finishing pig diet can increase daily weight gain, reduce feed-to-meat ratio, increase protein digestibility, reduce back fat thickness, and improve meat quality and carcass characteristics. Rare Earth Citric Acid is a new type of high-efficiency feed additive for pigs, chickens, fish, shrimps, cattle, sheep, rabbits, silkworms and other animals. It can promote animal growth, improve product quality, and improve disease resistance and survival rate. Improve the feed conversion rate, shorten the feeding cycle and so on. For cosmetics Citric acid is a type of fruit acid, the main role is to speed up keratinocyte renewal, commonly used in lotions, creams, shampoos, whitening products, anti-aging supplies, acne products. Keratinous renewal helps skin's melanin flaking, fine pores, and blackheads dissolve. For sterilization The combined action of citric acid and 80°C has a good effect in killing bacterial spores and effectively kills contaminating bacterial spores in the pipeline of hemodialysis machines. The lemon that enjoys the reputation of “King of Western Food†has a strong bactericidal effect and is good for food hygiene. With the smell of lemon, people have always liked to use it to make cold dishes, which are not only refreshing, but also increase appetite. For medicine In the formation of prothrombin activators and subsequent coagulation, calcium ions must participate. Tantalate ions and calcium ions can form a soluble complex that is difficult to dissociate, thus reducing the concentration of calcium ions in the blood and impeding blood coagulation. The product is used as an in vitro anticoagulant when transfusion or laboratory blood anticoagulation. Chemical processing or deep processing of citric acid Another major use of citric acid is deep processing, which is a rich industrial chain. Medicinal value (1) Citric acid has the effect of preventing and eliminating skin pigmentation. Chinese medicine practitioners believe that lemon is warm, bitter, and non-toxic. It has the functions of thirst-quenching, endurance-treating, stagnation, stomach and analgesia. It also regulates vascular permeability and is suitable for edema and puffiness. Smokers need to eat more lemons because they need twice as much vitamin C as non-smokers. Lemon is low in calories and has a strong shrinkage, so it is beneficial to reduce fat and is a weight loss medicine. Lemon prevents cardiovascular arteriosclerosis and reduces blood viscosity. Hot lemon juice and honey are very effective in treating bronchitis and nasopharyngitis. Gandhi lungs, acid and diabetes, appetite hangover, whitening, emollient, lower cholesterol. Remaining brewing, can be applied to the face to treat facial spots, whitening. (2) Embarrassment: Even less known is that lemon can also simmer, and its efficacy is stronger than orange and orange. Add lemon juice to warm water and salt, and drink it to cough up the thick phlegm accumulated in the throat. When you catch a cold, you may wish to use lemon and honey to drink water, which can relieve sore throat and reduce the discomfort of your throat. Higher organism conversion Citric acid is an important compound in the physiological process of converting fats, proteins and sugars into carbon dioxide. These chemical reactions are the core reactions of almost all metabolism and provide energy for higher organisms. This series of reactions is referred to as the "citric acid cycle," the "tricarboxylic acid cycle," or the "Kirschner cycle." Maintain the body Drinking a glass of lemonade every morning before entering any food can strengthen gastrointestinal motility, treat constipation, remove toxins from the body, and achieve beauty. It can also remove bad breath and eliminate bad breath. Each morning a cup of hot lemon water, can also make the eyes more God, the skin is more red. If you add more lemon juice in the water, it will also play a role in removing garbage from the body. We, Jiangsu YanFang Medical Technology Co., Ltd, commenced our medical gloves manufacturing in 2020. Currently, we possess a total of 12 high-capacity NBR Glove Dipping Production Lines. Lab Nitrile Gloves,Disposable Nitrile Gloves,Powder Free Nitrile Gloves,Chemical Resistance Nitrile Gloves,Safety Nitrile Gloves Jiangsu Yanfang Medical Technology Co.,Ltd. , https://www.yanfangchina.com
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