UV/H2O2 degradation of 4-aminoantipyrine: A voltammetric study

This work studied the degradation of 4-aminoantipyrine (4-AAP) by UV/H2O2 process and monitored the degradation process by an electroanalytical approach. Instead of traditional costly instrumental analysis, we developed a sensitive determination method for 4-AAP by utilizing a CNT film-modified glassy carbon electrode which showed dramatic promotion towards the electrochemical response of 4-AAP. On such a modified electrode, the peak current increased linearly with the concentration of 4-AAP in the range of 5.0 × 10−5–2.0 × 10−3 mol/l with a detection limit of 2.6 × 10−5 mol/l. Based on this electroanalytical method, the photodegradation of 4-AAP was successfully monitored. The operation parameters of UV/H2O2 process such as the dosage of H2O2 and pH value were investigated systematically, which demonstrated that the electroanalytical approach was effective to study the photodegradation of organic compounds.