Sample Weight: 0.5 g per element
Arsenic and Antimony are determined by Hydride Generation Atomic Absorption Spectrometry (HGAAS). Samples are fused at 750°C with sodium peroxide and the fusion cake dissolved in a dilute nitric acid. The sample solution is reduced with a sodium borohydride solution to generate a volatile hydride for analysis by atomic absorption spectroscopy.
|Element||Concentration (low)||Concentration (high)|
|As, Arsenic||0.5 ppm||300 ppm|
|Sb, Antimony||0.5 ppm||300 ppm|
Data will be deemed acceptable if recovery of Arsenic and Antimony is ±20% at five times the Lower Limit of Determination (LOD) and the calculated Relative Standard Deviation (RSD) of duplicate samples is no greater than 20%.
Central Mineral and Environmental Resources Science Center