원료 ≫ 미네랄 ≫ 인 P
킬레이트 작용 chelate
인산염의 식품에서의 역할 : 인산염의 역할
- pH 조정제
- 유화 보조제
- 팽창제
- 인산의 킬레이트 작용
봉쇄제 Chelating agent
- EDTA, 피트산, 옥살산 oxalic acid, 구연산, 인산
2. Sequestrants
Calcium hexametaphosphate
Calcium phosphate (monobasic)
Dipotassium phosphate
Sodium acid phosphate
Sodium hexametaphosphate
Sodium metaphosphate
Sodium phosphate (mono, di, tri basic)
Sodium pyrophosphate
Tetrasodium pyrophosphate
Sodium tripolyphsopahte
Since the work of Schwarzenbach in 1949, phosphonic acids are known as effective chelating agents. These phosphonates are the structural analogues to the well-known aminopolycarboxylate such as EDTA. The stability of the metal complexes increases with increasing number of phosphonic acid groups. Phosphonates are highly water-soluble while the phosphonic acids are only sparingly so.
Phosphonates are effective chelating agents. That is, they bind tightly to di- and trivalent metal ions, which is useful in water softening. In this way, they prevent formation of insoluble precipitates (scale). The binding of these ligands also suppresses the catalytic properties of metal ions. They are stable under harsh conditions. For these reasons, an important industrial use of phosphonates is in cooling waters, desalination systems, and in oil fields to inhibit scale formation. Phosphonates are also regularly used in reverse osmosis systems as anti-scalants. Phosphonates in cooling water systems also serve to control corrosion of iron and steel. In pulp and paper manufacturing and in textile industry they serve as "peroxide bleach stabilizers", by chelating metals that could inactivate the peroxide. In detergents they are used as a combination of chelating agent, scale inhibitor, and bleach stabilizer. Phosphonates are also increasingly used in medicine to treat disorders associated with bone formation and calcium metabolism.
Sodium triphosphate (STP), also sodium tripolyphosphate (STPP), or tripolyphosphate (TPP),[1]) is an inorganic compound with formula Na5P3O10. It is the sodium salt of the polyphosphate penta-anion, which is the conjugate base of triphosphoric acid.
In detergents[edit]
The majority of STPP is consumed as a component of commercial detergents. It serves as a "builder," industrial jargon for a water softener. In hard water (water that contains high concentrations of Mg2+ and Ca2+), detergents are deactivated. Being a highly charged chelating agent, TPP5− binds to dications tightly and prevents them from interfering with the sulfonate detergent.[5]
Food applications[edit]
STPP is a preservative for seafood, meats, poultry, and animal feeds.[5] It is common in food production as E number E451. In foods, STPP is used as an emulsifier and to retain moisture. Many governments regulate the quantities allowed in foods, as it can substantially increase the sale weight of seafood in particular.