Supplier Page from Thermo Fisher Scientific for Potassium hydroxide, Acculute Standard Volumetric Solution, Final Concentration 0.5N
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
Copper, plasma standard solution, Specpure:r, Cu 1000µg/mL from Thermo Fisher Scientific
Platinum standard solution, for AAS, 1 µg/mL Pt in 10-20% HCl from Thermo Fisher Scientific