ICP Multi-element (23) Standard Interference Check Sample AB: Cl @ 3600ppm, C @1000ppm, Ca,Na,K,Mg,P,Al,Fe,S @500ppm, Mo,Ti @10ppm, Co,Ni,V @0.2ppm, Zn,Mn,As,Cr,Cu,Se,Ag, @0.2ppm and Cd @0.05ppm in 2-5% HNO3 + tr. HF