China's "Sanitary Standards for the Use of Food Additives" (GB2760-2014) stipulates that the amount of use depends on the normal production needs.
Sodium citrate is used in refreshing drinks to alleviate sourness and improve taste. Adding this product to brewing can promote saccharification, and the dosage is about 0.3%. In the manufacture of sorbet and ice cream, sodium citrate can be used as an emulsifier and stabilizer in an amount of 0.2% to 0.3%. This product can also be used as a fatty acid-preventing agent for dairy products, a tackifier for processed cheese and fish products, and a sweetness correcting agent for foods.
Sodium citrate has a variety of excellent properties as described above, making it a very versatile use. Sodium citrate is non-toxic, has pH-adjusting properties and good stability, so it can be used in the food industry. Sodium citrate is used as a food additive and has the largest demand. It is mainly used as a flavoring agent, a buffering agent, an emulsifier, a swelling agent, a stabilizer and a preservative. In addition, sodium citrate is compatible with citric acid and used as a variety of jams. Gelling agents, nutritional supplements and flavoring agents for jelly, fruit juices, beverages, cold drinks, dairy products and pastries.
In medicine, sodium citrate is also widely used. The use of citrate and calcium ions to form a soluble complex can be used as an anticoagulant and a blood transfusion agent to preserve and process blood products. Sodium citrate is used as a preservative to preserve drugs such as syrup. Sodium citrate is used in the same way as potassium salt to correct the acidity of blood, body fluids and urine, as a diuretic, phlegm and so on. Sodium citrate is compatible with other reagents for extracting and purifying animal liver ribonucleic acid.
Sodium citrate has good water solubility, excellent chelating ability for metal ions such as Ca2+ and Mg2+ in water, biodegradability, dispersing ability and strong anti-redeposition ability, so it is gradually becoming a substitute for sodium tripolyphosphate. Products, used to produce non-phosphorus detergents, especially non-phosphorus liquid detergents. Adding a certain amount of sodium citrate to the detergent can significantly increase the detergent's detergency.
The large use of sodium tripolyphosphate as a builder in detergents is an important finding in the synthetic detergent industry. However, phosphate is discharged into rivers and lakes with washing wastewater, resulting in eutrophication of water, promoting rapid propagation of algae, lack of oxygen in water, and endangering the survival of aquatic animals, thus becoming a major environmental issue. Since the 1970s, developed countries such as Europe and the United States have proposed the problem of limiting phosphorus in detergents, and have made provisions on their content. In our country, due to various reasons, especially the price factor, the past issues have not received sufficient attention. With the rapid development of the detergent industry and the deterioration of water quality, the detergent industry is also developing towards low phosphating and non-phosphorus.
Liquid detergents containing sodium citrate have excellent washing performance, and therefore, various special detergents have been developed at home and abroad. Liquid detergents containing sodium citrate also have other excellent properties. Some special cleaning agents containing sodium citrate are not corrosive to certain metal appliances, so they can be used to clean precious precision instruments, etc.; some contain lemons. After the sodium special detergent cleaning device, the metal surface is bright as new, and the washed waste liquid can be recycled and reused after treatment, thereby reducing the washing cost. It has been reported that in order to solve the problem of pesticide residues on foods such as vegetables and fruits, relevant experts have developed special cleaning agents for pesticide residues in fruits and vegetables containing sodium citrate.
Sodium citrate has a good complexing property and is therefore widely used in the electroplating industry. In the construction industry, sodium citrate can be added to concrete as a retarder to improve the tensile, compressive and frost resistance of cement products. In terms of environmental protection, sodium citrate can be used to remove sulfides from industrial exhaust. In the ceramic industry, sodium citrate can be used as a grinding aid. In addition, sodium citrate has new applications in the brewing and photographic industry, further broadening the application of sodium citrate.
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