Supplier Page from Thermo Fisher Scientific for 1,3-Diphenylguanidine, primary standard, 99+%
Chromium, plasma standard solution, Specpure:r, Cr 10,000 µg/mL from Thermo Fisher Scientific
Sulfur in Heavy Mineral Oil standard solution, Specpure:r, 500µmg/g (0.0500%) from Thermo Fisher Scientific
Sulfur in Light Mineral Oil standard solution, Specpure:r, Blank (0.0000%) from Thermo Fisher Scientific
Zinc, Oil based standard solution, Specpure:r, Zn 1000µmg/g from Thermo Fisher Scientific