| Vitamin Bi is a very important nutrient in infant formula, which plays an irreplaceable role in the growth of newborn and premature infants.. Therefore, the contents and the stability of vitamin B1 in infant formula milk powder are important.. Vitamin Bi is a kind of low molecular compound that the body maintains normal metabolism and function. It is one of the important nutrition elements of human body, must be obtained from food. People in the daily diet, in addition to containing a variety of protein, fat, oleic acid, which contains a lot of vitamin B1, somehow it can meet the needs of the body of vitamin B1, human daily requirement of vitamin B1 differences due to many reasons, such as physical, occupational, disease, living environment and other different will be caused to different amount of people’s demand of vitamin B1. These recent years, with China rapid development, the living standard of the Chinese people is to improve and because of differences in age, people’s daily eating habits more or less happening changes, such as eating coarse food less and fine rice noodles increased etc., such lessons will cause the diet structure unreasonable phenomenon, relatively easy to trigger vitamin Bi deficiency caused a series of diseases, which is a kind of special nutritional deficiency diseases [1].Vitamin Bi make by the pyrimidine ring and thiazole ring through the combination of methylene. For the white crystalline or crystalline powder; a faint smell of the special, bitter, has lead moisture, dew placed in the air, easy to absorb moisture. Easy decomposition of metamorphism in alkaline solution. At pH 3.5 is resistant to high temperature of 100℃, with alkaline increases, its molecular structure will be changed. The vitamin B1 is decomposed easily when pH is more than 5. Vitamin B1 also can cause the effect of light and heat, so the titer can be decreased, so the light avoidance and light operation should be avoided. Vitamin B1 if the preservation of the Yin and humid place, the preservation period is not long, prone to metamorphism. It is relatively stable in the acid or acidic solution or in the environment and in alkaline or partial alkaline solution or in the environment is not stable, prone to oxidation reaction or heat causes lead to structure was destroyed. Sulfite, sulfur dioxide and other reducing substances can make vitamin Bi inactivation of [2lVitamin B1 mainly exists in the seed husks and germ, such as rice bran and wheat bran content is very rich, in yeast content is also very rich. The contents of lean meat, cabbage and celery were also rich.. The use of vitamin B1 are chemical synthesis of the product. In the body, vitamin B1 in the form of coenzyme to participate in the decomposition of sugar metabolism, the protection of the nervous system, but also to promote gastrointestinal motility, increase appetite.Vitamin B1 is white crystal, soluble in water, slightly soluble in ethanol, chloroform; hydrochloride is a white crystalline powder, easy deliquescence, bitter, soluble in water, slightly soluble in ethanol, insoluble in ether, the melting point of 245 ℃ to 250℃. Easy decomposition metamorphism under alkaline conditions. Synthetic route can be made from acrylonitrile or propylene two as raw material.. Ethyl-ethyl-beta-ethyl-ethyl acetate, ethyl formate, sodium wire, etc. are used to produce [2].Lack of vitamin B1, can cause a variety of neurological inflammation, such as beriberi. Symptoms caused by a lack of vitamin B1 multiple neuritis, patients with peripheral nerve endings have inflammation and degeneration and associated with limb numbness, muscle atrophy, heart failure, lower extremity edema. From 18 to 19 century, beriberi in China and Japan, especially in the Southeast Asia area popular, when each year about hundreds of thousands of people died of beriberi. Ancient Chinese medical books in the early treatment of beriberi records, the Chinese famous doctor Sun Simiao known skin treated with Gu beriberi. In modem medicine, vitamin Bi preparation for treating beriberi and a variety of neurological inflammation has remarkable curative effect.In this paper, the effects of light, temperature, antioxidants, oxidants, metal ions. pH and vitamin B1 on the stability of the water solution are studied in this paper.. The results show that the vitamin Bi in the dark or no fluorescent lamp is stable, and the residual rate after 6h remains above 70%. And sunlight or strong light will cause significant loss of vitamin B1, after 6h after the residual rate of less than 40%; in addition, vitamin B1 by the effect of temperature is more obvious, under the environment of high temperature, concentrated alkali or alkali of vitamin B1. Vitamin B1 aqueous solution at pH less than 5 heating effects rarely, at pH= 3.5, vitamin Bi can withstand high temperature heating and not to change significantly, at this pH is heated to 120℃ can still maintain their physiological activity does not change in pH is equal to 3, even 140℃ under the environment of high-pressure cooking to one hour damage is rarely; vitamin B1 at a pH of greater than 6 heating degradation rate increased significantly, when the pH is equal to 7 boiling, which destroyed most of the components of vitamin B1, while at pH equals 8 above boiling leads to thiazole ring fracture completely. Iron ion, copper ion, manganese ion cause vitamin B1 loss.The effect of the production process on the stability of vitamin B1 was emphatically studied. The results showed that the content of vitamin B1 in high temperature sterilization was decreased, and the loss rate was about 8.23%. The stability of vitamin B1 was not significantly affected in homogeneous and fluidized bed drying.Finally, the stability and degradation kinetics of vitamin B1 in the processing of the milk powder and the storaging of infant formula milk powder was studied.. The stability of vitamin Bi in infant formula and its future research direction is studied by the part of the whole system. |
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