Inorganic Ventures' Quality Control Standard 3 is a 125mL certified reference material set in a nitric acid matrix for stability. This standard is Traceable to NIST and manufactured in accordance with our stringent Quality Assurance guidelines. One year Expiration Date. Analytes: Ag = 10 µg/mL As = 10 µg/mL Ba = 10 µg/mL Be = 10 µg/mL Ca = 10 µg/mL Cd = 10 µg/mL Co = 10 µg/mL Cr = 10 µg/mL Cu = 10 µg/mL Fe = 10 µg/mL K = 10 µg/mL Mg = 10 µg/mL Mn = 10 µg/mL Mo = 10 µg/mL Na = 10 µg/mL Ni = 10 µg/mL Pb = 10 µg/mL Sb = 10 µg/mL Se = 50 µg/mL Th = 10 µg/mL Tl = 10 µg/mL U = 10 µg/mL V = 10 µg/mL Zn = 10 µg/mL