aqua regia

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aqua re·gi·a

 (rē′jē-ə, rē′jə)
A corrosive, fuming, volatile mixture of hydrochloric and nitric acids, used for testing metals and dissolving platinum and gold. Also called nitrohydrochloric acid.

[New Latin aqua rēgia : Latin aqua, water + Latin rēgia, feminine of rēgius, royal (because it dissolves gold, the "royal metal").]
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.

aqua regia

(Elements & Compounds) a yellow fuming corrosive mixture of one part nitric acid and three to four parts hydrochloric acid, used in metallurgy for dissolving metals, including gold. Also called: nitrohydrochloric acid
[C17: from New Latin: royal water; referring to its use in dissolving gold, the royal metal]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

aq′ua re′gi•a

(ˈri dʒi ə)
a mixture of nitric and hydrochloric acids used to dissolve precious metals.
[1600–10; < New Latin: literally, royal water]
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.aqua regia - a yellow fuming corrosive mixture of nitric and hydrochloric acid that dissolves metals (including gold)aqua regia - a yellow fuming corrosive mixture of nitric and hydrochloric acid that dissolves metals (including gold)
acid - any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
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References in classic literature ?
Zaffre, digested in aqua regia, and diluted with four times its weight of water, is sometimes employed; a green tint results.
Over limits of copper, lead and zinc were analyzed by AAS with aqua regia digestion.
Total elemental analysis of the co-granulated products was determined by digesting ~0.1 g of each in an aqua regia (3 HCl: 1 HN[O.sub.3]) mixture.
Highest amount of chromium was detected in sample 1 when dissolved in aqua regia and nitric acid while in sulphuric acid no chromium was detected at all.
It is noticed that the distance between two gold electrodes was increased to 29.6 [micro]m from the designed value of 2.2 [micro]m due to the overetching process of gold electrodes using aqua regia solution.
This, however, is that powdered fulminating gold, which out of a solution of gold in aqua regia, by the fusion of oil of tartar through liquefaction (be careful, though and do not use too much, or you will lose the fulminating ...
The samples were originally analyzed by ME-ICP41 method, which uses aqua regia digestion but with this method some metal-bearing-minerals may dissolve only partially.
Its derivative is chloroauric acid HAuCl4, which forms when Au dissolves in aqua regia. Gold (III) complexes, like acid HAu[Cl.sub.4], which forms when Au dissolves in aqua regia.
This is because dissolving silver in aqua regia produces silver chloride which may hinder the manipulation for determine the grade of silver.
Ashes from solid samples (particulate matter and shrimps) were digested in 20 mL of 50% aqua regia solution for 2 hours in Teflon crucibles at 80 [degrees]C.
The determination of lead and cadmium in hair and saliva, using the conventional aqua regia digestion procedure, consisted of dissolving samples in a 3:1 mixture of HCl and HN[O.sub.3] and digesting on a hotplate for 3hrs [23].
Aqua regia test results indicate flotation concentration is very amenable to pre-treatment options, such as pressure oxidation.