MACHEREY-NAGEL 931215 VISOCOLOR ECO Chlorine 2 Test Kit Instructions
- June 3, 2024
- MACHEREY-NAGEL
Table of Contents
NAGEL 931215 VISOCOLOR ECO Chlorine 2 Test Kit Instructions
931215 VISOCOLOR ECO Chlorine 2 Test Kit
Test kit for performing colorimetric tests on free and total chlorine in drinking water, swimming pools, and water reservoirs
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
a) 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.
b) 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.
c) 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, chloramine,
iodine and, in part, chlorine dioxide aswell. Higher manganese compounds simu
late 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 ample for the bromine determination istaken from this
solution. Result in mg/L Cl2 x 2.25 = mg/L Br2.
Conversion table:
| mg/L Cl2 | mg/L ClO2 | mg/L OCl | mg/L NaOCl | mg/L Br | mg/L I2 |
|---|
0.1
0.2
0.3
0.4
0.6
0.9
1.2
2.0| 0.2
0.4
0.6
0.8
1.1
1.7
2.3
3.8| 0.1
0.3
0.4
0.6
0.9
1.3
1.7
2.9| 0.2
0.4
0.6
0.8
1.3
1.9
2.5
4.2| 0.2
0.5
0.7
0.9
1.4
2.0
2.7
4.5| 0.4
0.7
1.1
1.4
2.1
3.2
4.3
7.2
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.
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
· info@mn-net.com
· www.mn-net.com