Multi-element calibration standard-2A LabKings alternative for: OEM 8500-6940 Ag, Al, As, Ba, Be, Ca, Cd, Co, Cr, Cs, Cu, Fe, Ga, Hg, K, Li, Mg, Mn, Na, Ni, Pb, Rb, Se, Sr, Tl, U, V, Zn @ 10 µg/mL in 2% HNO3, 2 x 100mL. Certified for 18 months