MN Powder Pillow Total Chlorine Instruction Manual
- October 26, 2023
- MACHEREY-NAGEL
Table of Contents
MN Powder Pillow Total Chlorine Instruction Manual
Measuring range
- 0.03–6.00 mg/L Cl2 [method 7211]
- 0.03–4.00 mg/L O3 [method 7212]
Method
Photometric determination of total chlorine or ozone. 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 or ozone can be determined. In order to obtain accurate results the sample must be analyzed immediately after collection and cannot be preserved for later analysis. Bubbles in the sample cell can cause higher results and must be avoided. This may require an additional gentle shaking.
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.
Procedure:
Requisite accessories: 2 test tubes 16 mm OD (REF 91680) or 2 test tubes 24 mm
OD (REF 936101)
-
Rinse test tube several times with sample (pH value of sample must be between pH 4 and 8)
Blank (optional): -
Fill one test tube with 5 mL* of sample
-
Clean test tube
-
Place test tube in photometer as blank value and adjust for zero
Sample: -
Fill another test tube with 5 mL* of sample
-
Add content of 1 Powder Pillow total Chlorine
-
Close test tube and shake well
-
Clean test tube
-
Wait for 2 min
-
Measure
*Alternative procedure: Use 10 mL of sample.
Measurement:
See manual for all MACHEREY-NAGEL photometers. After use, rinse out test tubes
thoroughly and seal them. Suitable for the analysis of sea water.
Interferences
The temperature of the water sample should be between 10 °C and 50 °C. Br2 and
I2 interfere at all levels.
Manganese compounds in high oxidation states interfere at all levels. ClO2 and
other oxidizing agents interfere at all levels.
Disposal of samples
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Information regarding disposal can be found in the safety data sheet. You can download the SDS from www.mn-net.com/SDS.
Support
MACHEREY-NAGEL GmbH & Co. KG
Neumann-Neander-Str. 6–8 · 52355 Düren
Germany
Tel.: +49 24 21 969-0
[email protected]
www.mn-net.com