chelation

(redirected from Complexing agent)
Also found in: Thesaurus, Medical, Encyclopedia.
Related to Complexing agent: Chelating agent, chelate, EDTA

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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

chelation

(ˈkiːleɪʃən)
n
1. (Chemistry) chem the process by which a chelate is formed
2. (Zoology) animal husbandry the process by which trace elements in an animal's feed are bonded to amino acids, ensuring their absorption into the animal's body
3. (Physical Geography) geology the chemical removal of metallic ions in a mineral or rock by weathering
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

che•la•tion

(kiˈleɪ ʃən)

n.
1. the process of chelating.
2.
a. a method of removing certain heavy metals from the bloodstream, used esp. in treating lead or mercury poisoning.
b. a controversial treatment for arteriosclerosis that attempts to remove calcium deposits from the inner walls of the coronary arteries.
[1930–35]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.chelation - (medicine) the process of removing a heavy metal from the bloodstream by means of a chelate as in treating lead or mercury poisoning
physical process, process - a sustained phenomenon or one marked by gradual changes through a series of states; "events now in process"; "the process of calcification begins later for boys than for girls"
medical specialty, medicine - the branches of medical science that deal with nonsurgical techniques
2.chelation - the process of forming a ring by forming one or more hydrogen bonds
chemical action, chemical change, chemical process - (chemistry) any process determined by the atomic and molecular composition and structure of the substances involved
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
chélation

chelation

n quelación f; — therapy terapia quelante
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
References in periodicals archive ?
It entails subjecting the load to a wash liquor comprising at least 900ppm of an aminocarboxylated complexing agent. The liquor, which is free of phosphate, dispersant polymer, sulfonated polymer and carboxylated polymers, is comprised of a crystal growth inhibitor, wherein the complexing agent is selected from the group consisting of methyl glycine diacetic acid and its salts.
To study the autocatalytic deposition of Ni accompanied by P incorporation in the film, it is necessary to know the effect of the operating parameters and bath chemistry on the deposition rate and the quality of the deposits, such as the substrate nature [16], pH [17, 18], plating temperature [19], stirring [20], light [21], stabilizers [22], complexing agent [23], and additives [24].
These benefits are significantly lower detection limits, use of commonly available complexing agent, and above all application of more friendly for lab analysis and environment working electrode.
Karandlkar and Gibbins developed an antimicrobial polyurethane foam that is formed from a multi-functional isocyanate, an aqueous polyol, an antimicrobial metal, and a complexing agent. The complexing agent forms a stable blend of the antimicrobial metals with the polyol.
Thus, for rather weak organic bases which [pK.sub.a] value does not exceed five, the six molecules of organic ligand are the part of the internal sphere according to coordination number of complexing agent metal.
A simple, safe and rapid method on the basis of cloud point extraction(CPE) with tergitol TMN-6 had been used for the preconcentration and extraction of gold(Au) ion in selenium reduction solution sample prior to flame atomic absorption spectrometry (FAAS).Pyrrolidine dithio fromic acid salt(PDFAS)which was regarded as a selective complexing agent could formed stable Au-complex with Au ion, and Au-complex could be extracted by TMN-6 at a short time.
Determination of potential availability using a strong absorbent or complexing agent. (EH/4/7).
The addition of complexing agent can control the deposition rate of the iron to form a continuous and uniform coating layer.
The glycine has been used as a complexing agent in the electrodeposition of Zn-Ni [22], Cu-Co [23], Zn-Co [24,25], Zn-Co-Cu [26], and Co-Ni-Mo alloys [27] and to obtain Zn [28].
where [Ni.sup.2+] + m[L.sup.-n]] denotes the nickel complex and m[L.sup.-n] the "free" complexing agent. As shown in equation (2), the deposition rate of the EN plating is influenced by the concentration of nickel ions, hypophosphite ions, phosphite ([H.sub.2]P[O.sub.3.sup.-]), pH values, and [L.sup.-n].
The [Na.sub.2]EDTA was used as a complexing agent to chelate with [Sn.sup.2+] to obtain Sn-EDTA complex solution.