Range:Cl 5 ~≥1000 mg/L (ppm)

5, 10, 20, 30, 50, 100, 150, 200, 300, 600, ≥1000 ppm

Method:Potassium Iodide color comparison

Reaction Time:10sec

Quantity(pcs/box):50test

Cautions

1. Chloride ion Cl- is not measurable by this method. We recommend to use the Chloride ion

PACKTEST, ref: WAK-Cl(200), the Chloride ion (Low range) PACKTEST, ref: WAK-Cl(D) or the

Drop Test Chloride, ref: WAD-Cl.

2. The normal pH range is 3 - 9. If necessary, adjust the pH with diluted sulfuric acid or sodium

hydroxide solution.

3. The reaction color becomes stronger than 1000mg/L of standard color when the chlorine

standard solution is 9000mg/L.

The reaction color becomes colorless when the standard solution is higher than 90,000mg/L.

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

5. Partially undissolved reagent will not affect the measurement.

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

reaction time.

7. Read the test under a daylight type lamp.

8. Put the line back into the aperture after using to prevent reagent spilt.

측정절차

Interferences

Standard colors were determined from standard solutions. However, coexisting substances will

cause inaccurate results. The list below reports substances concentrations under which ones

interferences are insignificant:

≤ 1000 mg/L : Al3+, B3+, Ba2+, Ca2+, Cl-, F-, K+, Mg2+, Mn2+, Na+, NH4

+, Ni2+, NO3

-, PO4

3-, SO4

2-, Zn2+,

Anionic surfactant

≤ 100 mg/L : Fe3+

≤ 10 mg/L : Cr6+

≤ 5 mg/L : Cu2+

Hydrogen peroxide and other oxidizing chemicals can interfere with the colored reaction.

The Residual Chlorine (High range) PACKTEST is not suitable for sample containing starch. Iodide

reacts with starch to make a blue-black complex.

The Residual Chlorine (High range) PACKTEST is suitable for sea water samples.