“…Moreover, two biosensors based on anti-NAA polyclonal antibody [17] or auxin binding protein immobilized on stabilized lipid films [18] were also developed for NAA determination. Sioda et al focused on electrochemistry of naphthalene derivatives [19][20][21] including NAA [19] on GCE in the supporting electrolyte based on a mixture of acetone with water (1:1) and (CH3)4N(BF4). Particularly, NAA provided two oxidation signals (at about +1.6 and +2 V vs. Ag/AgCl (1 mol L −1 ) reference electrode).…”