aqua regia


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ni·tro·hy·dro·chlor·ic ac·id

(nī'trō-hī'drō-klōr'ik as'id),
An extremely caustic mixture that contains 18 parts nitric acid and 82 parts hydrochloric acid.
Synonym(s): aqua regia, aqua regalis, nitrimuriatic acid

aqua regia

Latin for a fuming, highly corrosive mixture of nitric and hydrochloric acids in a 1:3 ratio, so known as it dissolves noble (regal) metals gold and platinum.
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References in periodicals archive ?
However in aqua regia and nitric acid its amount was 12.
Comparative Study of Different Metals in Rocks of Heroshah Malakand Pakistan
Make a solution of one dram of gold in aqua regia in the usual way.
The colloidal gold and copper colourants in the high fire: Jon Singer shares the results of comparisons he made in his research
The results demonstrate the reliability of the aqua regia method for heavy element analysis although concentrations were high which may be attributed to various factors like acid interference, external contaminations (although a blank was used as a precaution), and technical errors.
Levels of lead and cadmium in hair and saliva of school children in Ceres District, South Africa
Gold analyses were performed by 30 gram fire assay with an AA finish and silver was analyzed as part of a multi-element ICP package using an aqua regia digestion.
Silver Sun: Milling from Cherry Hill Yields 15.21 oz/T Gold in Concentrate
Rock samples were analyzed with a 36 element ICP mass spectrometer package, using a 15 gram sample split and a modified aqua regia digestion.
Strongbow Discovers Copper, Gold, and Silver Mineralization at Chilcotin Gold Properties, South Central British Columbia
The known quantity of powdered sample was digested by using hydrofluoric acid and aqua regia (1HNO3:3HCL) for the analysis of gold, silver and other base metals.
Preliminary investigations of the rocks of Shigari Bala area, Skardu, Gilgit- Baltistan, Pakistan in the perspective of gold and base metal mineralization
EN 16317:2013 + A1:2017 - Fertilizers and liming materials - Determination of arsenic by inductively coupled plasma-atomic emission spectrometry (ICP-AES) after aqua regia dissolution.
United Kingdom : CEN updates affecting chemical measurements March 2017
Representative portion of the sample was treated with aqua regia (3HCL:1HNO3) for base and other metals (i.
Preliminary study of the rocks of Golo Das and surrounding areas, Gilgit-Baltistan, Pakistan in the perspective of gold and base metals mineralization
Silver and base metals were analyzed as part of a multi-element ICP package using an aqua regia digestion; samples with more than 100 g/t silver, 1% copper, 1% lead and/or 1% zinc (over limit) were re-analyzed using 'ore grade' detection limits.
Yale to Option the Carol Property
All copper, zinc and silver assays were determined by Aqua Regia digestion with a combination of ICP-MS and ICP-AES finish, with overlimits (>100 ppm Ag, >10,000 ppm Zn, and >10,000 ppm Cu) completed by fire assay with gravimetric finish (Ag) or Aqua Regia digestion with ICP-AES finish (copper and zinc).
Canada : Callinex intersects 24.9 meters of sulphide mineralization near edge of large geophyical target

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