what is the role of N2 gas in polarographic analysis
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A correlation between the reduction potential of heterocyclic compounds and their effectiveness as radiosensitizing agents in cancer therapy has been reported in the literature. This correlation provides a guide for evaluating the effectiveness of newly synthesized compounds as radiosensitizers. The half-wave reduction potential (E1/2) of selected nitroimidazoles, nitrotriazoles and heterocyclic amine N-oxides was measured at a dropping mercury electrode in a Britton-Robinson buffer, pH 7.4. The effect of various substituent groups on the half-wave reduction potential of the heterocyclic compounds was investigated and the results are compared with published data.
So nitrogen acts as oxidising agent responsible thereby reduction takes place
A single reduction wave was observed with the nitroimidiazoles and nitrotriazoles, whereas multiple reduction waves were conserved with several of the N-oxides of pyridine, quinoxaline and phenazine. When electron-attracting substituents were attached to the heterocyclic ring on nitroimidazole and nitrotriazole, the reduction of the nitro group was easier and E1/2 shifted in the positive direction relative to that of the parent compound.