Supplier Page from Thermo Fisher Scientific for Sulfur in Heavy Mineral Oil standard solution, Specpure:r, 5µmg/g (0.0005%)
Calcium standard solution, for AAS, 1 µg/mL Ca in 2 to 5% HNO3 from Thermo Fisher Scientific
Potassium chloride, µ=0.000027M, Conductivity Standard from Thermo Fisher Scientific
Rhenium, plasma standard solution, Specpure:r, Re 1000µg/mL from Thermo Fisher Scientific
Sulfur in Diesel Fuel standard solution, Specpure:r, 750µmg/g (0.075%) from Thermo Fisher Scientific