NO3 (질산염) : 90, 225, 450, 900, 2250, 4500mg/l

NO3-N (질산성질소) : 20, 50, 100, 200, 500, 1000mg/l

Method:Griess Romijin Method after Zinc Reduction

Reaction Time:5min

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 : B3+, Ba2+, Ca2+, Cl-, F-, I-, K+, Mg2+, Mn2+,Na+, NH4+, PO43-, SO42-, Phenol

≤ 500 mg/L : CN-

≤ 250 mg/L : Al3+

≤ 20 mg/L : As3+, Pd2+, Zn2+

≤ 5 mg/L : Cr3+ , Anionic surfactant, Residual chlorine

≤ 1 mg/L : Co2+,Ni2+, NO2-,

Sub-ppm level: Ag+, Cd2+, Cr6+, Cu2+, Fe2+, Fe3+, Mo6+, Pb2+

The Nitrate(High range) PACKTEST is suitable for sea water samples, but some sea weter need 10 - 20 minutes forreaction.

Oxidative and reductive chemical can interfere.

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