Photostabilization of Phenoxyacetic Acid Herbicides MCPA and Mecoprop by Hydroxypropyl-β-cyclodextrin

Figure 2

Square wave voltammograms obtained for the photodegradation of 0.5 mM solutions of MCPA in the (A) absence and (B) presence of 35 mM concentration of HP-β-CD after (a) 0, (b) 25, (c) 50, (d) 65, (e) 75, and (f) 130 hours of irradiation in pH 4 acetate buffer electrolyte. Scan rate: 50 mV s⁻¹.