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").]

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]

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]
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
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.
Determination of cadmium, chromium, lead and nickel by inductively coupled plasma-atomic emission spectrometry (ICP-AES) after aqua regia dissolution, EN16317 - Fertilizers and liming materials.
Briefly, the samples were digested with 10 ml of HFfor one hour, and with 20ml of aqua regia till dryness.
However in aqua regia and hydrochloric acid its amount was high as compared to the solutions of sample 2 in nitric and sulphuric acids.
Dissolve gold in aqua regia in a little flask and let the solution evaporate until there remain little purple cakes.
4) Aqua regia - A liquid mixture of concentrated hydrochloric acid and concentrated nitric acid in a ratio of 3:1 by volume.
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.
Aqua regia test results indicate flotation concentration is very amenable to pre-treatment options, such as pressure oxidation.
Total heavy metal contents were determined by ICP-MS following microwave assisted aqua regia digestion.
These articles, originating from about 1835 to 1845, include such topics as inorganic neutral oxysalts in general and phosphates, arseniates, phosphites and arensites in particular, the reaction and products of sulfurous acid and iron or zinc, nitric sulphate oxide and experimental demonstrations proving its non-existence, the nature of Aqua Regia, reciprocal actions of sulfurous and hyponitric acids, observations on the Theory of Peligot, the function of water, the formulation of hypoiodous acid, the existence of double salts in codeine and morphine, and the quantitative determination of chlorine and hydrochloric acid when the two gases occur together.