Starch is a common polysaccharide that is widely present in plants, such as grains, vegetables, and tubers. Starch is one of the main sources of energy for humans and is also a commonly used raw material in food processing. Sodium metabisulfite plays an important role in the processing and utilization of starch. China sodium metabisulfite produced by Tianya Chemical is supplied to many starch processing companies in the world, including tapioca starch processing in southeast Asia countries. Our sodium metabisulfite is with whiter color, gentle odor and high purity, and it is more popular for starch companies users.
Sodium metabisulfite plays the role of a whitening agent in the processing of starch. In the process of starch preparation, in order to achieve the desired whiteness, it is necessary to bleach the starch. Sodium metabisulfite has strong redox properties and can reduce the pigment substances in starch to colorless substances, thereby achieving a whitening effect. The whitening effect of sodium metabisulfite makes starch more popular in industry and can be used to prepare various food and industrial products.
Sodium metabisulfite plays an important role in the stability of starch. Starch is prone to microbial invasion during processing and storage, leading to quality degradation and deterioration. Sodium metabisulfite has a strong antibacterial effect, which can effectively inhibit the growth of microorganisms in starch and extend the shelf life of starch. In addition, sodium metabisulfite can also inhibit the enzyme activity in starch, reduce the enzymatic hydrolysis reaction of starch, and thus improve the stability of starch.
Sodium metabisulfite can also improve the processing performance of starch. During the processing of starch, problems such as increased viscosity and decreased fluidity often occur, which affects the quality and processing efficiency of the product. Sodium metabisulfite can form a cross-linked structure by binding with proteins in starch, thereby increasing the viscosity and elasticity of starch and improving its processing performance. Sodium metabisulfite can also increase the water solubility and viscosity of starch, making it easier to apply in food processing.
Sodium metabisulfite can also play a role in the swelling process of starch. Starch expands at high temperatures to form expanded starch, which has a rich pore structure and a large specific surface area, and can be used to prepare expanded and functional foods. Sodium metabisulfite can be used as a puffing agent for starch, which combines with water molecules in the starch to promote the expansion of starch molecules at high temperatures, forming puffed starch. The addition of sodium metabisulfite can improve the degree and speed of starch expansion, making the expanded starch have better taste and edible properties.
Sodium metabisulfite has various functions in starch, including whitening agents, antibacterial agents, improvers, and puffing agents. The addition of sodium metabisulfite can improve the whiteness, stability, processability, and swelling properties of starch, making it more widely and conveniently used in food processing and industrial applications. However, when using sodium metabisulfite, it is also necessary to pay attention to its dosage and usage method to avoid adverse effects on the human body and environment.