Pectin is a kind of polysaccharide, which is composed of two types: homogeneous polysaccharide and heteropolysaccharide. They mostly exist in the cell wall and inner layer of plants, and a large number of them exist in the peel of citrus, lemon, grapefruit and so on. It is white to yellow powder, with a relative molecular mass of about 20000 ~ 400000, odorless. It is more stable in acidic solution than in alkaline solution, and is usually divided into high ester pectin and low ester pectin according to its esterification degree. High ester pectin forms a non-reversible gel in the range of soluble sugar content ≥60% and pH=2.6 ~ 3.4. Some methyl esters of low ester pectin are converted into primary amide, which is not affected by sugar and acid, but needs to be combined with calcium, magnesium and other bivalent ions to form gel.
| Product Name |
Pectin |
| Purity |
99.0%min |
| Product Grade |
Food Grade; Pharmaceutical Grade |
| Source |
Citrus |
| Appearance |
White, off-white or light yellow powder |
Pectin has always been a natural part of the human diet and is a safe, non-toxic natural food additive recommended by the Joint FAO/WHO Committee on Food Additives with no daily limit. Pectin has many functions. For example, pectin, as a natural plant colloid, can be widely used in the food industry as a gelling agent, stabilizer, tissue forming agent, emulsifier and thickener. Pectin is also a water-soluble dietary fiber, which has the function of enhancing gastrointestinal peristalsis and promoting nutrient absorption, and has a good effect on the prevention and treatment of diarrhea, bowel cancer, diabetes, obesity and other diseases, and is an excellent drug preparation substrate. At the same time, pectin is a good heavy metal adsorbent, because the molecular chain of pectin can form an "egg carton" -like network structure with high-priced metal ions, so that pectin has a good function of absorbing heavy metals; In addition, pectin has film-forming properties, good water retention and radiation resistance.
Food industry
As a food additive or ingredient used in the food industry, pectin mainly plays the role of gelling, thickening, improving texture, emulsification and stability.
(1) Yogurt products
In the production process of yogurt, different kinds of pectin have different roles. For example, the addition of high-fat pectin can stabilize the structure of yogurt, while the addition of low-methoxy pectin can prevent the precipitation of whey. In the process of making yogurt, it is necessary to strictly control the dosage of pectin. Once a sufficient amount of additives are not added, the charge will be neutralized, the repulsive force will fade, and the structure of dairy products will not be stable, and only after continuing to add new repulsive force, the structure of acidic dairy products can remain stable.
(2) Jam
If the production of jam, the raw material in the pectin content is too little, then you can use the thickening effect of pectin, with 0.20% pectin as a thickener. The amount of pectin used in low-sugar jam is about 0.60%. The recipe of low sugar strawberry jam is 50.00% strawberry, 36.00% granulated sugar, 13.00% water, 0.60% amidation low methoxyl pectin and 0.40% citric acid. In the above recipe of strawberry jam, you can use amide low methoxyl pectin or methoxyl pectin, because the fruit and water contain a certain amount of calcium ions, so there is no need to add calcium salt.
(3) Bread
High methoxyl pectin has strong water absorption, which can not only increase the amount of dough, but also improve the freshness, stability and softness of dough. Because the dough after adding pectin has better ductility, the baking volume of the bread will increase. For example, in hamburger preparation, if the volume of the hamburger is kept the same, but the pectin is added, the flour used to make the same volume of hamburger will be reduced by 30%. In addition, bread made with pectin added dough can extend the selling time of bread.
(4) Beverage
With the attention of people to diet health, low-sugar drinks in the market today have become more and more popular, but the taste of drinks will also decline after the sweetness is reduced. In this regard, the taste of the drink can be increased by adding 0.05% to 0.10% of high methoxyl pectin. High methylate pectin is a kind of suspension agent. When it is added to drinks containing pulp, it can produce gelling reaction with calcium ions, thereby reducing hard substances caused by pulp precipitation, making the fruit particles uniformly suspended in the drink, and improving the taste of the juice. It not only overcomes the shortcomings of sodium alginate, such as poor pseudoplasticity, large gum taste and large turbidity. It also plays a health role in strengthening the stomach and exposure to lead poisoning.
Health food and medicine
Pectin is a polysaccharide that helps control blood sugar and blood fats. At present, pectin products have been used in domestic medicines and health products, but the amount of pectin is not large.
Unlike other dietary fibers, the structural properties of pectin give it good water solubility and high viscosity, and this soluble dietary fiber can remove food additives and metal residues from the human system.
Other applications
In addition, the use of pectin good water retention and radiation resistance, pectin can be applied to plastic wrap, diapers, cosmetics and toothpaste.
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