Large sample neutron activation analysis of dross from India Government Mint, Mumbai was carried out for quantification of
gold (Au) and silver (Ag) using graphite reflector position of Advanced Heavy Water Reactor critical facility at Bhabha Atomic
Research Centre, Mumbai. The k0-based internal monostandard NAA was used to calculate concentration ratios of Au and Ag with respect to sodium (Na), which
was used as an internal monostandard. The concentration ratio values of Au to Na of varying mass of dross showed that mass
≥2 g was the representative sample size for analysis. Concentrations of gold and silver were found to be in the range of 200–400
and 1200–1700 mg kg−1, respectively in three different samples.