Buffering and Sequestering Agents

Buffering and sequestering agents used in different food products include organic acids, such as acetic acid, citric acid, carbonates, fumaric acid, malic acid, and phosphoric acids. These agents have not imparted any adverse effects in food products. 

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In this process, in addition to being a buffering and sequestering agent, silicate is known to provide detergency and anti-redeposition properties during the flotation de-inking process. 

Use Food additive, buffer and sequestering agent, vitamin tablets. 

Potassium citrate is used in beverages, foods, and oral pharmaceutical formulations as a buffering and alkalizing agent. It is also used as a sequestering agent and as a therapeutic agent to alkalinize the urine and to relieve the painful irritation caused by cystitis. See Table I. 

Other Components Other components of emulsion polymerization systems include electrolytes and sequestering agents. Sometimes electrolytes are added to act as buffers and to avoid the hydrolysis of monomers containing the ester group or the acceleration of persulfate initiators decomposition as well [79, 111], It has to be kept in mind that the addition of electrolytes has an influence on the colloidal stability of the latex, CMC, micellar aggregation number, and adsorption of surfactant, as well as on other physicochemical phenomena [25],... 

Citric acid (melting point 153°C, density 1.665) is one of our most versatile organic acids and is used as an acidulant in carbonated beverages, jams, jellies, and other foodstuffs. Another large outlet is in the medicinal field, including the manufacture of citrates and effervescent salts. Industrially citric acid is used as an ion-sequestering agent buffer and in the form of acetyl tributyl citrate, as a plasticizer for vinyl resins. 

Dibasic sodium phosphate is used in a wide variety of pharmaceutical formulations as a buffering agent and as a sequestering agent. Therapeutically, dibasic sodium phosphate is used as a mild laxative and in the treatment of hypophosphatemia. ... 

Carboxylic acids can be obtained from the oxidation of vicinal diols in the presence of cobalt complexes [320-322]. a-Ketols have been oxidized to a-diketones by Cu(II) in buffered aqueous pyridine and the reaction exhibits a rate-controlling enolization step [323]. The catalytic effect of Fe(III) and Fe(II) on the autoxidation of acetoin in aqueous HCIO4 showed that the formation of an iron(III) enolate was the slow step [324]. The oxidation of monosaccharides in the presence of catalysts such as copper phthalocyanine or cobalt glutamate in the presence of alkaline compounds gave oxidation products which were useful sequestering agents [325]. Thus cleavage to the acid salts occurred. 

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