visocolor ECO Chlorine 1 Test Kit Instruction Manual

: June 4, 2024
: visocolor ECO

Table of Contents

visocolor ECO Chlorine 1 Test Kit Instruction Manual
Method
Interferences
Conversion table
Storage
References
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visocolor ECO Chlorine 1 Test Kit Instruction Manual

Method

At a pH value of 6.2 to 6.5 in a phosphate buffered system, free chlorine reacts with N,N-diethyl-1,4-phenylene diamine (DPD) and forms a red-violet dye. In the presence of iodide ions, the content of total chlorine (free and combined chlorine together) can be determined

Measurement range:

0.1–2.0 mg/L Cl2

*Contents of test kit (refill pack):**
sufficient for 150 tests

6 g Cl2-1*
30 mL Cl2-2*
1 measuring spoon 70 mm*
2 screw-plug measuring glasses
1 slide comparator
1 color chart
1 plastic syringe 5 mL
1 instruction for use*

Hazard warning:
Information regarding safety can be found on the box’ label and in the safety data sheet. You can download the SDS from www.mn-net.com/SDS

Instructions for use:
Also refer to the pictogram on the back of the color chart

Free chlorine

Pour a 5 mL water sample into each of the measuring glasses using the plastic syringe (the pH value of the sample must be between pH 4 and 8.) Place a measuring glass on position A in the comparator.
Only add the reagent to measuring glass B.
Add 1 level measuring spoon of Cl2-1, seal the glass and shake well for 20 s.
Open the glass after 1 min and place it on position B in the comparator.
Slide the comparator until the colors match in the inspection hole on top.
Check the measurement reading in the recess on the comparator reed.
Mid-values can be estimated.
Total chlorine
Add 3 drops of Cl2-2. Seal the glass and mix.
Open the glass after 2 min, place it on position B in the comparator and read off the chlorine value as described above.
After use, rinse out both measuring glasses thoroughly and seal them.
Combined chlorine
The content of combined chlorine can be calculated as the difference between total and free chlorine.
The reagents can be used also for the photometric evaluation with pho- tometers PF-3 / PF-12 and PF-12 Plus.
This technique can be used also for analyzing sea wate

Disposing of the samples:
Information regarding disposal can be found in the safety data sheet. You can download the SDS from www.mn-net.com/SDS

Interferences

The determination of free chlorine measures bromine, bromine, chloramine, iodine, and, in part, chlorine dioxide as well. Higher manganese com- pounds simulate free chlorine. Chlorine concentrations above 10 mg/L can bleach the red reaction color (low results). Rinse glass tubes several times thoroughly. Residues of Cl2-2 can cause higher values for free chlorine. Determination of bromine besides chlorine: If chlorine is present in the sample, it can be destroyed by adding a spatula of glycine (approx. 20 mg) to 25 mL sample. The sample for the bromine determination is taken from this solution. Result in mg/L Cl2 x 2.25 = mg/L Br2

Conversion table

mg/L Fe mmol/m3

0.04 0.7
0.07 1.3
0.10 1.8
0.15 2.7
0.20 3.6
0.30 5.4
0.50 9.0
1.0 18

For swimming pools (in Germany) please note:
If the content of free chlorine is below 0.3 mg/L, add some chlorinating reagent. If the content is above 0.6 mg/L, add fresh water. The ideal pH value is 7.4.