Supplier Page from Thermo Fisher Scientific for Potassium hydroxide, Acculute Standard Volumetric Solution, Final Concentration 0.1N
Calcium carbonate, ACS reagent, chelometric standard from Thermo Fisher Scientific
Silicon standard solution, for AAS, 1 µg/mL Si in 2% NaOH from Thermo Fisher Scientific
Tellurium, plasma standard solution, Specpure:r, Te 1000µg/mL from Thermo Fisher Scientific
Zinc, Oil based standard solution, Specpure:r, Zn 5000µmg/g from Thermo Fisher Scientific