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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