Range:0.1, 0.2, 0.5, 1, 2, 5 mg/l

Method:Methylene Blue

Reaction Time:15min

Quantity(pcs/box):40

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+, Ba2+, Ca2+, Cd2+, Cl-, Cr3+, F-, Fe3+, K+, Mg2+, Mn2+, Na+, NH4

+, Ni2+, NO3

-,

SO4

2-, Zn2+

≤ 500 mg/L : Pb2+, Anionic surfactant

≤ 50 mg/L : Phenol

≤ 20 mg/L : Fe2+, PO4

3-, SO3

2-, S2O3

2-

≤ 10 mg/L : CN-,

≤ 5 mg/L : Cr6+, NO2

-

≤ 2 mg/L : Cu2+

sub-ppm level : Ag+, Hg2+, I-, SCN-, Residual Chlorine

Oxidizing chemical can react with the reagent.

The Sulfide (hydrogen sulfide) PACKTEST is not suitable for a seawater sample.

Sulfide ions precipitate with metal ions. In this case, precipitated sulfide can not be detected with

this PACKTEST.