ICP Multi-element (26) Standard, in 4%HNO3 + trace HF Al, Sb, As, Ba, Be, B, Cd, Ca, Cr, Co, Cu, Fe, Pb, Mg, Mn, Mo, Ni, Se, Ag, Na, Ti, Tl, V, Zn at 100mg/l, K at 1000mg/l and Si at 50mg/l