MACHEREY-NAGEL Test 0-69 NANOCOLOR Nitrite 4 Test Tube User Manual
- June 3, 2024
- MACHEREY-NAGEL
Table of Contents
Test 0-69 NANOCOLOR Nitrite 4 Test Tube
User Manual
Test 0-69 NANOCOLOR Nitrite 4 Test Tube
Method:
Photometric determination with sulfanilamide and N-(1-naphthyl)ethylenediamine
| Range: | 0.1–4.0 mg/L NO2-N | 0.3–13.0 mg/L NO2 |
|---|---|---|
| Wavelength (HW = 5–12 nm): | 540 nm | |
| Reaction time: | 15 min (900 s) | |
| Reaction temperature: | 20–25 °C |
Contents of reagent set:
20 test tubes Nitrite 41 tube NANOFIX Nitrite 4 R2
Hazard warning:
This tube test does not contain any harmful substances which must be specially
labelled as hazardous.
Preliminary tests:
If the order of magnitude of the concentration in a sample is not known, a
preliminary test with QUANTOFIX® Nitrite (1–80 mg/L NO2–, REF 913 11) rapidly
gives this information. From the or- der of magnitude the required dilution
can be calculated and prepared directly.
Interferences:
Free chlorine, organic colloids and humic acids can cause interferences. The
following ions will not interfere:
< 1000 mg/L Ca²+, Cr(III), Cu²+, Fe³+, Mg²+, Mn²+, Ni²+–, Zn²+, Cl²+–, NO3–,
PO ³4–, SO²-4
< 10 mg/L Cr(VI) This method can be applied also for the analysis of sea
water.
Note:
For removal of emulsions, turbidities and color prior to the test, e.g. for
nitrite in cooling lubricants, seepage water from waste deposits etc., use
Reagents for sample preparation by clarification precipitation (REF 918 937).
Procedure:
Requisite accessories: piston pipette with tips
Open test tube, add
200 μL (= 0.2 mL) test sample (the pH value of the sample must be between pH 4
and 13) and
1 NANOFIX R2, close and mix. (Close NANOFIX tube immediately after use.) Clean
outside of the test tube and measure after 15 min.
Measurement:
For NANOCOLOR® photometers see manual, test 0-69. Measurement when samples are
colored or turbid: For all NANOCOLOR® photometers see manual, use key for
correction value.
Photometers of other manufacturers:
For other photometers check whether measurement of round glass tubes is
possible. Verify factor for each type of instrument by measuring standard
solutions.
Analytical quality control:
NANOCONTROL Nitrite (REF 925 68) Dilute 100+ addition solution with distilled
water (1+1): 2.1 mg/L NO2-N
Confidence interval: 1.9–2.3 mg/L NO2-N
Reference:
German standard methods for the examination of water, waste water and sludge
(DIN EN 26 777-D10)
MACHEREY-NAGEL GmbH & Co. KG
Neumann-Neander-Str. 6–8 · 52355 Düren
Germany
Tel.: +49 24 21 969-0
Fax: +49 24 21 969-199
info@mn-net.com
www.mn-net.com
PD 14122 / A031581 / 985 069 / 0274