chelating


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Related to chelating: Chelating agent

che·late

 (kē′lāt′)
adj. Zoology
Having chelae or resembling a chela.
n. Chemistry
A chemical compound in the form of a heterocyclic ring, containing a metal ion attached by coordinate bonds to at least two nonmetal ions.
tr.v. che·lat·ed, che·lat·ing, che·lates
1. Chemistry To combine (a metal ion) with a chemical compound to form a ring.
2. Medicine To remove (a heavy metal, such as lead or mercury) from the bloodstream by means of a chelate, such as EDTA.

che′lat·a·ble adj.
che·la′tion n.
che′la′tor n.
Translations

chelating

adj quelante; — agent quelante m, agente m quelante; iron-chelating agent quelante de(l) hierro
References in periodicals archive ?
Thus, there is increase in the demand for water treatment chemicals, which is expected to drive the growth of the global chelating resins market.
Summary: Thus, there is increase in the demand for water treatment chemicals, which is expected to drive the growth of the global chelating resins market.
In this work, chelating resin was prepared by chemical attachment of the chelating moiety, 4-(2-pyridylazo)resorcinol(PAR) onto silica gel using an eco-friendly chemical transformation.
* Specialty Hair Care--sulfate free surfactants, conditioning agents, chelating agents and silicones
Compared to Amberlite XAD-2 and XAD4 resins, Amberlite XAD-16 has larger surface area [9], which makes possible to increase the number chelating sites hence increasing the selectivity towards target metal ions.
Chelating capacity involves a central metal ion attached to a large molecule, which is a ligand, and forms a ring structure.
These include assays for total antioxidant capacity (TAC), [NO.sup.*], [H.sub.2][O.sub.2], [O.sub.2.sup.*-] and OH radical scavenging capacity; oxygen radical scavenging activity (ORAC); [Fe.sup.3+] and [Cu.sup.2+] reducing activity (FRAP and CUPRAC assay, resp.); metal chelating activity; [ABTS.sup.*+], [DMPD.sup.*+], and DPPH free radical scavenging activity; and lipid peroxidation inhibition capacity [19-21].
Chelates are highly stable products capable of maintaining the surrounded metal ions from an organic molecule (chelating agent); so its precipitation as insoluble hydroxides should be avoided with the care of the storage [15, 18].
From the foregoing, a high affinity for the targeted metal ions by the antioxidant, which results in their greater capability of scavenging the free active metal ions, is one of the key features of a good chelating agent [12].
During February 1991, the US FDA (Federal Drug Administration) approved DMSA under the product name Chemet as a chelating agent for lead in children as young as two years of age.