111Range:0.1, 0.2, 0.5, 0.8, 1.2, 2.5mg/l

Reaction Time:30sec

Method:Bathophenanthroline color comparison

Quatity(pcs/box):50test

Cautions

1. The Iron (Divalent) (Low range) PACKTEST allows only to measure divalent iron ion Fe2+. If you

wish to measure total iron fraction including suspending particles of a sample, for example:

“rusty water”, we recommend to process samples with sulfuric acid before to use the Iron

PACKTEST WAK- Fe.

2. Adjust a pH out of the range 5 - 9 with diluted sulfuric acid or sodium hydroxide solution.

3. Ensure that PACKTEST tube is filled up to the half.

4. Partially undissolved reagent will not affect the measurement.

5. Keep sample temperature in the range 15 - 40°C. Lower temperature necessitates longer

reaction time.

6. Read the test under a daylight type lamp.

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 : As3+, B3+, Ba2+, Ca2+, Cl-, Mg2+, Na+, NH4

+, NO3

-, SO4

2-, Phenol

< 500 mg/L : F-, I-, K+

< 250 mg/L : Mo6+, NO2

-

< 100 mg/L : Pb2+

< 50 mg/L : Cr3+, Mn2+

< 20 mg/L : Cd2+, PO4

3-, Zn2+

< 10 mg/L : Cr6+

< 5 mg/L : CN-, Ni2+, Residual chlorine

< 2 mg/L : Co2+

< 1 mg/L : Al3+, Sn2+

sub-ppm level: Cu2+

The Iron (Divalent) (Low range) PACKTEST is not suitable for sea water samples.