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Glossary entry

English term or phrase:

chelating agent

Bulgarian translation:

хелатен агент

Dec 16, 2009 15:56
14 yrs ago
English term

chelating agent

GBK English to Bulgarian 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 (Bulgarian)
5 +2 хелатен агент
Change log

Dec 16, 2009 15:11: changed "Kudoz queue" from "In queue" to "Public"

Dec 16, 2009 15:56: changed "Stage" from "Preparation" to "Submission"

Dec 19, 2009 16:56: changed "Stage" from "Submission" to "Completion"

Proposed translations

+2
1 hr
Selected

хелатен агент

По-рядко употребим, но, може би, по-добре отразяващ същността е терминът "хелатообразуващ агент".
Definition from own experience or research:
Вещество, чиято молекула може да свързва в комплекс метален йон чрез два или повече свои комплксообразуващи центрове (лиганди).
Example sentences:
Органичните микроминерали са химически свързани с хелатни агенти или лиганди под формата на смес с аминокиселини или с пептиди. Хелатното свързване съществува при много от микроминералите, срещани в природата. (company site)
Peer comment(s):
agree Svetla Ignatova : комплексообразуващ агент
26 mins
Благодаря. Вид комплексообразуващ агент.
agree Mihail Neykov : С превода съм съгласен, но не и с определението.
18 hrs
Благодаря. Разбира се, може да се обхване и по-голяма група - сигурно има монографии по въроса. Не съм сигурен дали трябва да се усложнява тук.
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4 KudoZ points awarded for this answer.
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