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.

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.
References in periodicals archive ?
However in aqua regia and nitric acid its amount was 12.
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.
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.
Rock samples were analyzed with a 36 element ICP mass spectrometer package, using a 15 gram sample split and a modified aqua regia digestion.
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.
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.
Representative portion of the sample was treated with aqua regia (3HCL:1HNO3) for base and other metals (i.
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.
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).