Spectroscopic standard 2cm thin strip of tantalum
circa 1980
Spectroscopic standard chromium pellets 10gm
circa 1980
Spectroscopic standard gallium rod 4N 10 gms
circa 1980
Spectroscopic standard tungsten wire 50 metres
circa 1980
Spectroscopic standard nickel 1 rod
circa 1980
Spectroscopic standard copper 1 rod
circa 1980
Spectroscopic standard short rod cadmium
circa 1980
Spectroscopic standard 0.5 cm rodpraesodimium oxide (Pr6O11)
circa 1980
Spectroscopic standard niobium 1 rod
circa 1980
Spectroscopic standard 0.5cm rod of zirconium oxide
circa 1980
Spectroscopic standard 0.1gm flakes of nickel/tungsten alloy
circa 1980
Spectroscopic standard 1 cobalt rod
circa 1980
Spectroscopic standard molybdenum
circa 1980
Spectroscopic standard titanium rod 1gm
circa 1980
Spectroscopic standard silicon 50 gms
circa 1980
Spectroscopic standard iron wire 9.5gms
circa 1980
Spectroscopic standard manganese 50 gms
circa 1980
Spectroscopic standard magnesium 8 rods
circa 1980