Range:0.05, 0.1, 0.2, 0.5, 1, 2 mg/l
Method:Diphenylcarbazide
Reaction Time:2min
Quantity(pcs/box):50
Interferences
Standard colors were determined from standard solutions. However, coexisting
substances will
cause inaccurate results. The list below reports ion concentrations under
which ones interferences
are insignificant:
≤ 1000 mg/L : Al3+, B3+, Ca2+, Cd2+, Cl-, CN-, F-, I-, Mg2+, Mn2+, Na+,
NH4
+, NO3
-, Pb2+,
PO4
3-, Sn2+, SO4
2-, Zn2+, Phenol
≤ 500 mg/L : Co2+, Ni2+
≤ 50 mg/L : NO2
-
≤ 30 mg/L : Mo6+
≤ 10 mg/L : Cu2+
≤ 5 mg/L : Residual chlorine
≤ 3 mg/L : Fe3+
The Chromium (hexavalent) PACKTEST is suitable for sea water samples
Total Chromium
Reducing chemical like disodium sulfite, As3+, Fe2+ may reduce of Cr6+ to
Cr3+ and stop the coloured
reaction. In this case, we recommend to use the Total Chromium PACKTEST (range:
0.5 - 20 mg
Cr/L, ref: WAK-Cr・T) to measure the total chromium content of your samples.
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