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J. Braz. Chem. Soc. vol.16 número4

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Figure 1. Molecular structures of nitrofurazone (NF) and hydroxymethylnitrofurazone (NFOH).O2NONNHONH2NFO 2 N O N NH O NH OHNFOH3245678
Table 1 shows the results obtained by linear sweep voltammetry (LSV) for the studied drugs
Table 2 presents the cyclic voltammetric results of NF at pH 7.45. The scan rate variation from 0.01 to 2.0 V s -1 increases the height of the reduction wave and Ec p1 is shifted towards negative potentials
Figure 4. Plot of E p vs. pH using GCE as a working electrode without sonication pre-treatment: („) Ec p1 value for the NF re-duction wave; (S) Ea p1 values corresponding to hydroxylamine oxidation of the nitroso derivative
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