7500 Series PA Tuning solution 1, 100ml, (OEM 5188-6524-1) As, Be Cd, Zn @ 20 µg/mL; Mg, Ni, Pb @ 10 µg/mL; Al, Ba, Bi, Co, Cr, Cu, In, 6Li, Lu, Mn, Na, Sc, Sr, Th, Tl, U, V @ 5 µg/mL; Y, Yb @ 2.5 µg/mL in 5% HNO3