Cobalt, 1,000 µg/mL (1,000 ppm) for ICP-MS, 125 mL
Supplier Page from Spex CertiPrep for Cobalt, 1,000 µg/mL (1,000 ppm) for ICP-MS, 125 mL
Ammonium (NH4+) Single-Element Ion Cation Standard, 1,000 µg/mL (1,000 ppm), 125 mL from Spex CertiPrep
AOAC Cannabis Pesticide Mix 5 from Spex CertiPrep
Boron, 10,000 µg/mL, for AA and ICP, 125 mL from Spex CertiPrep
Gold, 100 µg/mL (100 ppm) for ICP-MS, 125 mL from Spex CertiPrep