Supplier Page from Thermo Fisher Scientific for Potassium, plasma standard solution, Specpure:r, K 10,000µg/mL
Polystyrene standard, M.W. 900,000, Mw/Mn 1.10 from Thermo Fisher Scientific
Potassium chloride, 0.010M, Conductivity Standard from Thermo Fisher Scientific
Sulfur in Isooctane standard solution, Specpure:r, 5µmg/g (0.0005%) from Thermo Fisher Scientific
Tellurium, plasma standard solution, Specpure:r, Te 1000µg/mL from Thermo Fisher Scientific