Polarographic determination of nitramide.
Nitramide gives two cathodic polarographic waves with half-wave potentials varying with pH, and having minimum values - 1.22 V at pH 4.5 and - 1.58 V at pH 8.8. Nitramide is fist reduced to nitrosamine in a two-electron reduction. In the second step, hydroxy-hydrazine may be formed in a two-electron reduction, or hydrazine itself in a four-electron step. For the polarographic determination of nitramide the first wave is used, and the supporting electrolyte is a Britton-Robinson buffer 0.1 M in KCl, at pH < 5 and at 0-2 degrees.
Caluşaru
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Institute of Atomic Physics, Bucharest, Rumania.