MACHEREY-NAGEL Visocolor ECO Nitrite Test kit User Manual

MACHEREY-NAGEL Visocolor ECO Nitrite Test kit

Method:

Sulfanilamide is diazotized by nitrite in acidic solution. The diazonium salt is coupled with a naphthylamine to form a reddish-violet azo dye.

Measurement range:

0.02–0.5 mg/L NO2–

Contents of test kit (*refill pack):

sufficient for 120 tests

• **30 mL NO2-1***
  • 5 g NO2-2*
  • 1 measuring spoon 70 mm*
  • 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

1. Pour a 5 mL water sample into each of the measuring glasses using the plastic syringe.
   Place a measuring glass on position A in the comparator.
   Only add the reagent to measuring glass B.

2. Add 4 drops of NO2-1, seal the glass and mix.

3. Add 1 level measuring spoonful of NO2-2, seal the glass and shake the mixture until the powder has dissolved.

4. Open the glass after 10 min and place it on position B in the comparator.

5. Slide the comparator until the colors match in the inspection hole on top. Check the measurement reading in the recess on the comparator reed. Mid-values can be estimated.

6. After use, rinse out both measuring glasses thoroughly and seal them.

   • The reagents can be used for the photometric evaluation with photometer PF-12 / PF-12Plus.
   • 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:

Chromium(VI) and iron(III) ions present in excess of 3 mg/L simulate nitrite values which are too high. Chlorine interferes even in minute concentrations.

Conversion table

ABOUT COMPANY

• 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

References

• MACHEREY-NAGEL Webshop | MACHEREY-NAGEL

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