However in aqua regia
and nitric acid its amount was 12.
Make a solution of one dram of gold in aqua regia
in the usual way.
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.
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
Representative portion of the sample was treated with aqua regia
(3HCL:1HNO3) for base and other metals (i.
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).