Supplier Page from Thermo Fisher Scientific for Calcium standard solution, for AAS, 1 µg/mL Ca in 2 to 5% HNO3
Calcium carbonate, ACS reagent, chelometric standard from Thermo Fisher Scientific
Copper standard solution, for AAS, 1 µg/mL Cu in 2 to 5% HNO3 from Thermo Fisher Scientific
Platinum standard solution, for AAS, 1 µg/mL Pt in 10-20% HCl from Thermo Fisher Scientific
Rhenium, AAS standard solution, Specpure:r, Re 1000µg/mL from Thermo Fisher Scientific