MACHEREY-NAGEL 985017 NANOCOLOR Chlorine-Ozone 2 Tube Test Instructions
- June 3, 2024
- MACHEREY-NAGEL
Table of Contents
MACHEREY-NAGEL 985017 NANOCOLOR Chlorine-Ozone 2 Tube Test
Overview
The test is suitable for the photometric determination of chlorine / ozone.
The test is in accordance with APHA 4500-Cl G, DIN ISO 7393-2.
The test is suitable for surface water, ground and drinking water.
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Measuring range:
0.052.50 mg/L Cl2 (method 0171 / 0172)
0.052.00 mg/L O3 (method 0173)
0.094.80 mg/L ClO2 (method 0174) -
Number of tests: 20
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Wavelength for photometric determination: 540 nm
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Shelf life: 12 months
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Reaction time: 1 / 3 (Cl2 gesamt) / 2 (O3) / 1 (ClO2) minutes
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Storage temperature: 1525 °C
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Storage conditions: upright
Method
Photometric determination with DPD (N,N-diethyl-1,4-phenylendiamine) to produce a red violet dye.
Interferences
Too high concentrations may lead to a result that lies below the actual value:
20 mg/L The method can be applied for analyzing seawater.
Reagents and accessories
Contents of reagents set:
- 20 test tubes R0
- 1 reagent R2
Required devices:
- MACHEREY-NAGEL photometer
- Digital piston pipette 15 mL (REF 916909) with pipette tips (REF 916916)
Standards
- NANOCONTROL Chlorine (REF 92517)
Sampling and preparation
See DIN EN ISO 5667-3-A 21.
Adjust to pH 310 prior to analysis.
Quality control
The measurement of a blank value and a standard is recommended before every measuring series as quality control measure.
Quality data
The following data were determined during production according to ISO 8466-1 and DIN 38402-A51:
- Number of LOTs: 33
- Standard deviation of the method: ± 0.02 mg/L Cl2 · Coefficient of variation of the process: ± 1.57 %
- Confidence interval: ± 0.05 mg/L Cl2 Specified data for procedure:
- Sensitivity (absorbance of 0.010 A corresponds to): ± 0.03 mg/L Cl2
- Accuracy of a measurement value: ± 0.06 mg/L Cl2 LOT-specific certificates are available at www.mn-net.com.
Procedure
Free chlorine / chlorine dioxide
- Open test tube
- Pipette 4 mL of sample into test tube
- Seal test tube and shake vigorously
- Remove any air bubbles by slowly turning the cuvette
- Wait 1 min
- Clean outside of test tube
- Measure [method 0171 or 0174]
Total chlorine
Immediately after measuring the free chlorine:
- Open test tube
- Add 3 drops of R2
- Seal test tube and shake vigorously
- Wait 2 min (only total chlorine: 3 min)
- Clean outside of test tube
- Measure [method 0172]
Ozone
- Open test tube
- Add 3 drops of R2
- Add test solution as far as the lower edge of the printing (= 5 mL)
- Seal test tube and shake vigorously
- Wait 2 min
- Clean outside of test tube
- Measure [method 0173]
Notes
When using other photometers, make sure measurements are possible in test
tubes (16 mm OD) and calibrate the method. Correction value e. g. for colored
or turbid samples possible (see photometer manual).
Conversion: 0.10 mg/L Cl2 = 0.19 mg/L ClO2 = 0.15 mg/L OCl- = 0.21 mg/L NaOCl = 0.23 mg/L Br2 = 0.36 mg/L I2 For the determination of chlorine and ozone together, please request special instruction.
Determination of bromine together with chlorine:
To eliminate chlorine, add 1 small measuring spoon (approx. 20 mg) of glycine
to 25 mL test solution and dissolve by swirling. This solution can then be
used for the bromine determination. The conversion factor for l2 mg/L to Br2
mg/L is 2.25. 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. 11/2019
MACHEREY-NAGEL GmbH & Co. KG · Neumann-Neander-Str. 68 · 52355 Düren · Germany
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E-mail: info@mn-net.com
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