柠檬酸主要应用领域有以下几种：

The main application areas of citric acid are as follows:

　　食品工业领域：因为柠檬酸具有温和爽快的酸味，所以多用于各种饮料、汽水、罐头果汁、乳制品等。因为柠檬酸除了当调味剂之外还可以用作食用油的抗氧化剂。

In the field of food industry: Due to its mild and refreshing sour taste, citric acid is commonly used in various beverages, soda, canned fruit juice, dairy products, etc. Because citric acid can also be used as an antioxidant in edible oils in addition to being a seasoning agent.

　　化工和纺织业领域：在化学技术上柠檬酸可作化学分析用试剂，实验试剂、色谱分析试剂、络合剂、掩蔽剂，还可以配制缓冲溶液。用柠檬酸做助洗剂时，可以改善洗涤产品的性能，使金属离子迅速沉淀。

In the fields of chemical and textile industries, citric acid can be used as a chemical analysis reagent, experimental reagent, chromatographic analysis reagent, complexing agent, masking agent, and can also be used to prepare buffer solutions in chemical technology. When using citric acid as a washing aid, it can improve the performance of the washing product and facilitate the rapid precipitation of metal ions.

　　环保领域：柠檬酸—柠檬酸钠缓冲液可用于烟气脱硫。柠檬酸—柠檬酸钠缓冲液由于蒸气压低、无毒、化学性质稳定等特征，是极具开发价值的硫吸收剂。

Environmental protection field: Citric acid sodium citrate buffer can be used for flue gas desulfurization. Citric acid sodium citrate buffer is a highly valuable sulfur absorbent due to its low vapor pressure, non toxicity, and stable chemical properties.

　　禽畜生产领域：在仔猪的饲料中添加柠檬酸可以促使饲料利用率的提高。除此以外柠檬酸土是一种新型高效的饲料添加剂，使用后可促进动物生长，改善产品品质，提高抗病能力和成活率。

In the field of poultry and livestock production, adding citric acid to the feed of piglets can improve feed utilization efficiency. In addition, citric acid soil is a new and efficient feed additive that can promote animal growth, improve product quality, enhance disease resistance and survival rate after use.

　　医药行业领域：枸橼酸根离子与钙离子能形成一种难以解离的可溶性络合物，从而降低了血中钙离子浓度，使得血液凝固受阻。

In the pharmaceutical industry, citrate ions and calcium ions can form a soluble complex that is difficult to dissociate, thereby reducing the concentration of calcium ions in the blood and hindering blood coagulation.

　　除了柠檬酸主要应用领域以外，柠檬酸其它的应用领域还有很多，如：用于化妆品、用于杀菌，因为它还在高等生物体内发生转化，所以还可用于保养身体。

In addition to the main application areas of citric acid, there are many other application areas of citric acid, such as in cosmetics and for sterilization. Because it also undergoes transformation in higher organisms, it can also be used to maintain the body.

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