1. Citric acid is mainly used as sour agent, solubilizer, buffer, deodorizer, flavor enhancer, gelling agent, toner, etc. In addition, citric acid can also protect color, improve flavor and transform sucrose.

2、柠檬酸还具有螯合作用，能够除去某些有害金属。柠檬酸能够防止因酶催化和金属催化引起的氧化作用，从而阻止速冻水果变色变味。

2. Citric acid also has chelation and can remove some harmful metals. Citric acid can prevent the oxidation caused by enzyme catalysis and metal catalysis, so as to prevent the discoloration and taste of quick-frozen fruits.

3、在食品添加剂方面主要用于碳酸饮料、果汁饮料、乳酸饮料等清凉饮料和腌制品，其需求量受季节气候的变化而有所变化。柠檬酸约占酸味剂总消耗量的2/3。

3. In terms of food additives, they are mainly used in cool drinks and pickled products such as carbonated drinks, fruit juice drinks and lactic acid drinks. Their demand varies with the change of season and climate. Citric acid accounts for about 2 / 3 of the total consumption of sour agent.

4、在水果罐头中添加柠檬酸可保持或改进馆藏水果的风味，提高某些酸度较低的水果罐藏时的酸度，减弱微生物的抗热性和抑*其生长，防止酸度较低的水果罐头常发生的*菌性胀罐和破坏。

4. Adding citric acid to canned fruits can maintain or improve the flavor of fruits in the collection, improve the acidity of some fruit cans with low acidity, weaken the heat resistance and inhibit the growth of microorganisms, and prevent the bacterial swelling and damage of canned fruits with low acidity.

柠檬酸在化工和纺织业的作用  柠檬酸在化学技术上可作化学分析用试剂，用作实验试剂、色谱分析试剂及生化试剂；用作络合剂，掩蔽剂；用以配制缓冲溶液。采用柠檬酸或柠檬酸盐类作助洗剂，可**洗涤产品的性能；

The role of citric acid in chemical industry and textile industry citric acid can be used as chemical analysis reagent, experimental reagent, chromatographic analysis reagent and biochemical reagent in chemical technology; Used as complexing agent and masking agent; Used to prepare buffer solution. Using citric acid or citrate as washing aid can improve the performance of washing products;

可以迅速沉淀金属离子，防止污染物重新附着在织物上，保持洗涤必要的碱性；使污垢和灰分散和悬浮；提高表面**剂的性能，是一种优良的鳌合剂；可用作测试建筑陶瓷瓷砖的耐酸性的试剂。  服装的甲醛污染已是很**的问题，柠檬酸和改性柠檬酸可制成一种无甲醛防皱整理剂，用于纯棉织物的防皱整理。不仅防皱效果好，而且成本低。

It can rapidly precipitate metal ions, prevent pollutants from re adhering to the fabric and maintain the necessary alkalinity for washing; Disperse and suspend dirt and ash; It is an excellent chelating agent to improve the performance of surfactant; It can be used as a reagent to test the acid resistance of building ceramic tiles. Formaldehyde pollution of clothing is a serious problem. Citric acid and modified citric acid can be made into a formaldehyde free anti wrinkle finishing agent for anti wrinkle finishing of pure cotton fabrics. It not only has good anti wrinkle effect, but also has low cost.

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