12 COMPOSES DANS HNO3 4% POUR ICP MS Cr 5mg/l Pb 5mg/l V 5mg/l Mo 5mg/l Sn 5mg/l Be 5mg/l Mn 5mg/l As 1mg/l Se 1mg/l Ag 1mg/l Cd 1mg/l Sb 1mg/l 1 * 1 L