Supplier Page from Thermo Fisher Scientific for Gold, plasma standard solution, Specpure:r, Au 1000µg/mL
Calcium carbonate, ACS reagent, chelometric standard from Thermo Fisher Scientific
Germanium, plasma standard solution, Specpure:r, Ge 1000µg/mL from Thermo Fisher Scientific
Sulfur in Heavy Mineral Oil standard solution, Specpure:r, 100µmg/g (0.0100%) from Thermo Fisher Scientific
Sulfur in Light Mineral Oil standard solution, Specpure:r, 1,000µmg/g (0.10%) from Thermo Fisher Scientific