Custom Standard Solution A: Al, Cu, Fe, Se @ 20; Ag, B, Ba, Be, Cd, Co, Cr, Mn, Pb, Sr, Tl, V @ 10; As @ 1 μg/mL
in 5% HNO3 100mL 18 Months
Custom Standard Solution B: Zn @ 20; Mo, Ni, Sb, Zr @ 10; Sn @ 1 μg/mL in 5% HNO3/Tr HF 100mL 18 Months