The Al(III)-8-hydroxyquinoline (Al-8HQ) complex was adsorbed on a hanging mercury dropping electrode
(HMDE) at 0.300 V versus Ag/AgCl electrode during a 30 s accumulation time. An electrochemical cell containing
0.024 mol L−1 ammonia–ammonium acetate buffer (pH 6.80) as supporting electrolyte and 7.43 mg L−1
8-hydroxyquinoline (8-HQ) as ligand for aluminum were employed.