MACHEREY-NAGEL Visocolor ECO Chlorine 2 Test Kit User Manual
- June 3, 2024
- MACHEREY-NAGEL
Table of Contents
MACHEREY-NAGEL Visocolor ECO Chlorine 2 Test Kit
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
- 18 mL Cl2-1*
- 25 mL Cl2-2*
- 30 mL Cl2-3* (only REF 931015 / 931215)
- 2 screw-plug measuring glasses
- 1 slide comparator
- 1 color chart
- 1 plastic syringe 5 mL
- 1 instructions 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 one of the measuring glasses using the plastic syringe and place it on position A in the comparator. Only add the reagent to measuring glass B.
-
Fill the second measuring glass with 3 drops of Cl2-1.
-
Add 3 drops of Cl2-2.
-
Add a 5 mL water sample using the plastic syringe, seal the glass and mix.
-
Open the glass and place it on position B in the comparator.
-
Slide the comparator until the colors match in the inspection hole on top. Immediately check the measurement reading in the recess on the comparator reed. Mid-values can be estimated.
Total chlorine (only REF 931015 / 931215) -
Add 3 drops of Cl2-3. 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 difference of total and
free chlorine.
The reagents can be used also for the photometric evaluation with photometers
PF-11 / PF-12 / PF-3.
This technique can be used also for analyzing sea water.
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, bromamine, chlor-amine,
iodine and, in part, chlorine dioxide as well. Higher manganese compounds
stimulate free chlorine.
Chlorine concentrations above 10 mg/L can bleach the red reaction color (low
results).
Rinse glass tubes several times thoroughly. Residues of Cl2-3 can cause higher
values for free chlorine.
Note:
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
| 0.1 | 0.2 | 0.1 | 0.2 | 0.2 | 0.4 |
|---|---|---|---|---|---|
| 0.2 | 0.4 | 0.3 | 0.4 | 0.5 | 0.7 |
| 0.3 | 0.6 | 0.4 | 0.6 | 0.7 | 1.1 |
| 0.4 | 0.8 | 0.6 | 0.8 | 0.9 | 1.4 |
| 0.6 | 1.1 | 0.9 | 1.3 | 1.4 | 2.1 |
| 0.9 | 1.7 | 1.3 | 1.9 | 2.0 | 3.2 |
| 1.2 | 2.3 | 1.7 | 2.5 | 2.7 | 4.3 |
| 2.0 | 3.8 | 2.9 | 4.2 | 4.5 | 7.2 |
For swimming pools (in Germany) please note:
If the content of free chlorine is below 0.3 mg/L, add some chlorinating re-
agent. If the content is above 0.6 mg/L, add fresh water. The ideal pH value
is 7.4.
Storage
Store the test kit in a cool (< 25 °C) and dry place.
MACHEREY-NAGEL GmbH & Co. KG · Neumann-Neander-Str. 6–8 · 52355 Düren ·
Germany
Tel.: +49 24 21 969-0
[email protected]
Website: www.mn-net.com