Glossary entry (derived from question below)
English term or phrase:
chelating agent
Portuguese translation:
agente quelante
Dec 16, 2009 15:55
14 yrs ago
1 viewer *
English term
chelating agent
GBK
English to Portuguese
Tech/Engineering
Chemistry; Chem Sci/Eng
Definition from
Alconox, Inc.:
These are negatively charged or oxygen containing molecules that react with positively charged metal ions to form a stable complex. They have multiple locations in the molecule to react with multiple positive charges that may be present on multivalent metal ions that have more than one positive charge on them. An example of a chelating agent is EDTA, ethylene diamine tetraacetic acid. EDTA has four acetic acid groups giving it a potential for four negatively charged acetates to bond with up to four positively charged sites on metal ions with multiple positive charges, such as calcium which has two (2) positive charges associated with it.
Example sentences:
EDTA is a versatile chelating agent. It can form four or six bonds with a metal ion, and it forms chelates with both transition-metal ions and main-group ions. EDTA is frequently used in soaps and detergents, because it forms a complexes with calcium and magnesium ions. (University of Wisconsin)
HIDS shows superior performance as a chelating agent; high thermal stability, high solubility in concentrated alkaline solutions and low corrosion. (NIPPON SHOKUBAI CO.)
The extraction parameters were the type and concentration of chelating agent and the duration of extraction time. All the extractions that involved chelating agents were carried out at pH 7.0. The heavy metal extraction efficiencies of chelating agents were compared to those of HNO3, CaCl2, and deionized water. (ASCE)
Proposed translations
(Portuguese)
| 5 +8 | agente quelante |
txlouro
|
| 5 +2 | sequestrante |
Paulo Horsky
|
Change log
Dec 16, 2009 15:09: changed "Kudoz queue" from "In queue" to "Public"
Dec 16, 2009 15:55: changed "Stage" from "Preparation" to "Submission"
Dec 19, 2009 16:55: changed "Stage" from "Submission" to "Completion"
Proposed translations
+8
20 mins
Selected
agente quelante
Definition from
wikipedia:
No tratamento de envenenamentos metálicos por Pb (chumbo), Hg (mercúrio) ou outros elementos, agentes quelantes são administrados para “seqüestrar” os íons metálicos, formando quelatos que possibilitam sua eliminação pelo organismo. Este tipo de tratamento para eliminação de metais tóxicos é às vezes denominado quelação.
Example sentences:
EDTA (Ethylenediamine tetraacetic acid, ou ácido etilenodiamino tetra-acético) é um composto orgânico que age como agente quelante, formando complexos muito estáveis com diversos íons metálicos. Entre eles estão magnésio e cálcio, em valores de pH acima de 7 e manganês, ferro(II), ferro(III), zinco, cobalto, cobre(II), chumbo e níquel em valors de pH abaixo de 7. (Wikipedia)
4 KudoZ points awarded for this answer.
+2
4 hrs
Paulo Horsky
Ingénieur traducteur polyglote
Native in: Portuguese 
, French
Works in: French to Portuguese, Portuguese to French, Portuguese to English, and 7 more.
Related KudoZ points
:
47
sequestrante
Definition from
own experience or research:
agente quelante tem a propriedade de sequestrar ions metálicos
Example sentences:
Ficha Técnica de Produto EDTA de Cálcio e Sódio Dihidratado Grau ... EDTA de Cálcio e Sódio, Edetato de Cálcio Dissódico, EDTA Cálcico Dissódico, ... Indústria alimentícia como preservante, seqüestrante, antioxidante em óleos ... www.pluryquimica.com.br/.../EDTA%20C%E1lcico%20Diss%F3dico%20Dihidratado.pdf - (google)
Something went wrong...