Supplier Page from Thermo Fisher Scientific for Rhenium, plasma standard solution, Specpure:r, Re 1000µg/mL
Copper standard solution, for AAS, 1 µg/mL Cu in 2 to 5% HNO3 from Thermo Fisher Scientific
Potassium chloride, 0.0765M, Conductivity Standard from Thermo Fisher Scientific
Sodium, plasma standard solution, Specpure:r, Na 10,000µg/mL from Thermo Fisher Scientific
Sulfur in Isooctane standard solution, Specpure:r, 15µmg/g (0.0015%) from Thermo Fisher Scientific