1. gluconic acid delta-lactone is prepared by oxidizing glucose into gluconic acid or its salt, followed by purification, desalination, decoloration, concentration and crystallization. Used as coagulant, stabilizer, souring agent, preservative and preservative in food industry, it is a multifunctional food additive. Food additives are sold in the local market.

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Second, gluconic acid δ -lactone is white crystal or crystalline powder, odorless, sweet first and then bitter, and sour. Tofu produced as a protein coagulant is white and tender, without the bitterness of salt water or gypsum, without protein loss, with high yield and convenient use.

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1. glucono delta-lactone can be used in canned lunch meat and minced pork, which can increase the role of chromogenic agent, thus reducing the amount of toxic nitrite. At the same time, GDL also has emulsifying effect and antiseptic effect, thus improving the quality of canned minced meat, and its maximum dosage is 0.3%.

2. glucono delta-lactone is mainly used to produce yogurt or cheese. In industrial application, the gel strength of milk acidified by GDL is about twice that of fermented milk. When 0.025% ~ 1.5% is added to milk, the product can reach the required curd pH, while when 3% is added, the milk gel prepared at 30℃ has a similar structure to that prepared by lactic acid fermentation.

3. glucono delta-lactone can be added to sweet sherbet and jelly, such as vanilla extract, chocolate and banana. It is the main acidic substance in the compound leavening agent, which can slowly produce carbonic acid gas and produce cakes with unique flavor.