Sample Weight: 0.5 g
Selenium is determined by Hydride Generation Atomic Absorption Spectrometry (HGAAS). The sample is digested in a Teflon vessel with hot hydrochloric, nitric, hydrofluoric and perchloric acids. The sample solution is reduced with a sodium borohydride solution to generate a volatile hydride for analysis.
The reporting limit range for Selenium is 0.5 ppm to 300 ppm.
Data will be deemed acceptable if recovery of Selenium 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