ICP Water Quality standard 2 - 31 elements - Ca 100mg/l ; Mg 20mg/l ; Na 50mg/l ; K 50mg/l ; P 50mg/l ; S 200mg/l ; Si 100mg/l ; Al 0.5mg/l ; Ag 0.5mg/l ; As 1mg/l ; B 5mg/l ; Ba 0.5mg/l ; Be 0.2mg/l ; Bi 1mg/l ; Cd 0.05mg/l ; Co 0.2mg/l ; Cr 0.2mg/l ; Cu 0.5mg/l ; Fe 1mg/l ; Li 5mg/l ; Mn 0.2mg/l ; Mo 0.5mg/l ; Ni 0.5mg/l ; Pb 0.5mg/l ; Sb 1mg/l ; Se 1mg/l ; Sr 0.5mg/l ; Ti 0.2mg/l ; Tl 1mg/l ; V 0.5mg/l ; Zn 1mg/l in HNO3 5% - Certificati ISO 17034 / ISO 17025 - Validita 12 mesi