Polarographic Behaviour of Indole‐2‐Hydroxamic Acid by DPP

The differential pulse polarography technique (DPP) has been utilized to study the behaviour of indole-2-hydroxamic acid (2-IHA). This is a novel hydroxamic acid synthesized for us which exhibits properties as a ligand of metallic species. This ligand may enhance the determination of many trace metals using analytical techniques such as HPLC and DPP but first the properties of this ligand were studied. This reagent gives rise to one cathodic wave with an Ep value of −0,96 V. versus Ag/AgCl at pH 0.92. The principal characteristics of this wave have been studied and the possible mechanisms for the electrode process proposed. Under optimum conditions the limit of detection is 8×10−6 M.