Abstract:Bongkrekic acid is a highly toxic compound, in order to study the degradation effect of bongkrekic acid (BA) after ultraviolet irradiation, the standard solution of bongkrekic acid (BA) - methanol/water was used as the research object in this research, and the degradation effect of UV irradiation intensity, initial concentration of bongkrekic acid and thickness of liquid layer were investigated, and the degradation curve and degradation equation were fitted. Results showed that the UV irradiation can effectively reduce bongkrekic acid, and the higher degradation rate can be achieved under the higher UV intensity, the lower initial bongkrekic acid as well as the smaller thickness of the liquid layer; a degradation rate of 96.82% can be reached under 187 μW/cm2 of intensity and 2.5 μg/mL of initial concentration as well as a 2 mm of thickness liquid layer. Using SPSS software to establish a separate model of each factor and photolysis rate constant, and the linear regression was conducted, the model fitting degrees of the three factors were 0.9540, 0.9347 and 0.9643, respectively. On this basis, the comprehensive model of UV irradiation intensity (X1), initial concentration of myelic acid (X2), liquid layer thickness (X3) and UV irradiation constant (Y) was established by multiple linear regression method, the fitting degree of the model was 0.972, meaning that the regression equation was significant. The results of this study provide a theoretical basis for the degradation of bongkrekic acid by ultraviolet irradiation.
