Solutie tampon (acid citric/hidroxid de sodiu/acid clorhidric), trasabila NIST si PTB, pH 4.00(20°C), Merck, cod 1094351000
Amoniac 25% c.p.; Formula = NH3; Calitate = reactiv chimic pur; M = 17,03 g/mol; Continut = min.25%; Cloruri (Cl) = max.0,0002%; Sulfati (SO4) = max.0,0005%; Carbonati (CO3) = max.0,015%; Fosfati (PO4) = max.0,0005%; Reziduu la evaporare = max.0,0025%
Solutie standard de conductivitate 1413 µS/cm la 2...
Solutie tampon (acid citric/hidroxid de sodiu/acid clorhidric), trasabila NIST si PTB, pH 4.00(20°C), Merck, cod 1094351000
Amoniac 25% c.p.; Formula = NH3; Calitate = reactiv chimic pur; M = 17,03 g/mol; Continut = min.25%; Cloruri (Cl) = max.0,0002%; Sulfati (SO4) = max.0,0005%; Carbonati (CO3) = max.0,015%; Fosfati (PO4) = max.0,0005%; Reziduu la evaporare = max.0,0025%
Solutie standard de conductivitate 1413 µS/cm la 25°C, flacon 500ml, Hanna Instruments, cod HI6031