Supplier Page from Thermo Fisher Scientific for Tungsten, plasma standard solution, Specpure:r, W 10,000µg/mL
Nickel standard solution, for AAS, 1 µg/mL Ni in 2-5% HNO3 from Thermo Fisher Scientific
Polystyrene standard, M.W. 50,000, Mw/Mn 1.06 from Thermo Fisher Scientific
Praseodymium, plasma standard solution, Specpure:r, Pr 1000µg/mL from Thermo Fisher Scientific
Sulfur in Isooctane standard solution, Specpure:r, 5µmg/g (0.0005%) from Thermo Fisher Scientific