What Is Sodium Gluconate

Sodium gluconate, also known as sodium pentahydroxy organic acid, is a white crystalline particle or powder, its relative molecular weight is 218.14, the melting point is about 206 ℃, 10% aqueous solution pH 6.2~7.8, easily soluble in water, slightly soluble in alcohol, insoluble in ether, has a certain salty taste.
As a new type of functional seasoning, sodium gluconate can give food sour taste, improve food taste, prevent protein denaturation, cover up bad bitterness and astringency, and replace salt to make low-sodium and no-sodium food. In addition, it has the characteristics of non-toxic, non-deliquescence, good stability and chelating properties, and a wide range of raw materials, which has attracted much attention, and some new preparation technologies and applications are emerging.
What are the uses of sodium gluconate
1, used in the food industry
(1) Sodium gluconate can replace salt: Relevant studies have shown that excessive sodium intake can induce high blood pressure. Low sodium salt food has become a hot research topic in food industry. The salt taste of sodium gluconate is close to that of table salt, and the molecular weight of sodium is only 10.5%, compared with table salt, the sodium content of the former is only 1/4 of the latter. Compared with other low sodium salts, sodium gluconate has the advantages of non-irritating, non-bitter, and salty taste, and has become the best substitute for salt. At present, it is widely used in salt-free soy sauce, bread and other food fields.
(2) Sodium gluconate can improve food flavor: in the food industry, flavor is the most important indicator of food sensory function. At present, the production and application of flavor substances have become the focus of food researchers and producers. In recent years, it is found that sodium gluconate has the effect of covering up the bitterness of food, shielding the odor, improving the taste and so on, and has a significant effect on the improvement of food flavor. By adding sodium gluconate to low-fat cheese, the original bitter and astringent taste of low-fat cheese was eliminated, and the overall taste was improved. By comparing the flavor of lactone tofu prepared with sodium gluconate and gypsum as coagulant, it is found that the tofu prepared with sodium gluconate is more tender, and has higher taste and nutritional value.
(3) Sodium gluconate can enhance the nutritional characteristics of food: with the continuous improvement of people's living standards and health awareness, the requirements for food nutrition and flavor are gradually improved. As a multifunctional food additive, sodium gluconate can not only improve the flavor of food, but also enhance the nutritional characteristics of food.
2, used in medicine
Sodium gluconate plays an important role in maintaining extracellular osmotic pressure and volume, regulating acid-base balance, and exerting normal neuromuscular function, which can effectively prevent the occurrence of hyposodium syndrome.
3, as a water reducer
The water-to-cement ratio (W/C) can be reduced by adding a water-reducing agent. The following effects can be obtained by adding sodium gluconate:
(1) In the case of constant water-to-cement ratio (W/C), adding sodium gluconate can improve workability. At this time, sodium gluconate acts as a plasticizer. When the amount of sodium gluconate is less than 0.1%, the degree of workability improvement is proportional to the amount added.
(2) When the cement content remains constant and the water content in the concrete can be reduced (i.e., W/C is reduced). When the amount of sodium gluconate is 0.1%, the amount of water added can be reduced by 10%.
(3) The water and cement content is reduced in the same proportion, and the W/C ratio remains unchanged. At this time, sodium gluconate is used as a cement reducing agent.
4, used as steel surface cleaning agent
If the steel surface needs to be plated with platinum, chromium, tin and nickel to adapt to special uses, the billet surface needs to be strictly cleaned, so that the coating is firmly combined with the steel surface, and the addition of sodium gluconate to the cleaning agent will achieve a very ideal effect.
5, as a glass bottle special cleaning agent
The glass bottle professional cleaning agent with sodium gluconate as the main formula can improve the cleaning force is not strong, easy to block the nozzle and pipeline of the bottle washing machine; The removal of rust on bottle stickers and bottlenecks is not ideal; The trace residue after washing is not ideal for food safety (such as phosphate residue); Washing water is discharged as a public hazard (does not meet the national standards).
6, used as water quality stabilizer
Sodium gluconate is widely used as water quality stabilizer because of its excellent corrosion and scale inhibition. Has obvious coordination effect, suitable for molybdenum, silicon, phosphorus, tungsten, nitrite and other formulations; The corrosion inhibition rate increases with the increase of temperature. Strong scale inhibition ability, calcium, magnesium, iron salt has a strong complexing ability; As a circulation, cooling water corrosion and scale inhibitor to eliminate public hazards.