20 COMPOSES DANS HNO3 5% Ag 2mg/l Al 4mg/l As 4mg/l Ba 4mg/l Cd 0.5mg/l Cr 4mg/l Cu 1mg/l Fe 2mg/l K 50mg/l Mn 2mg/l Mg 6mg/l Na 3mg/l Ni 4mg/l Pb 3mg/l Se 6mg/l Sb 4mg/l Zn 1.5mg/l Mo 4mg/l B 5mg/l P 20mg/l 1 * 1 L