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Determination of NO3- ions by colorimetric titration

Equipment and reagents

  • Standard laboratory equipment, in particular: volumetric flasks, spectro cuvettes, Erlenmeyer flasks, glass beads.
  • A spectrophotometer
  • A microwave oven
  • Sodium salicylate solution at 0.5%
  • Commercial sulfuric acid solution at 96%
  • Double potassium and sodium tartrate solution at 60 g.L-1 in sodium hydroxide
  • Sodium nitrate stock solution at 100 mg of NO3-.L-1
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