Supplier Page from Thermo Fisher Scientific for Erbium, plasma standard solution, Specpure:r, Er 10,000µg/mL
Calcium carbonate, chelometric standard, ACS, 99.95-100.05% from Thermo Fisher Scientific
Iron standard solution, for AAS, 1 µg/mL Fe in 2 to 5% HNO3 from Thermo Fisher Scientific
Multi-Element Plasma Standard Solution 2, Specpure® from Thermo Fisher Scientific
Potassium standard solution, for AAS, 1 µg/mL K in 2-5% HNO3 from Thermo Fisher Scientific