Fig. 1. Three-dimensional fluorescence spectrum of 20 mg·L^-1 abamectin technical solution
1: Ex/Em=270 /297 nm; Int.=111.772

Fig. 2. Fitting curve of abamectin technical solution

Fig. 3. The linear fit between the predicted value and the measured value in thevalidation set of abamectin technical

Fig. 4. 1∶1 000 abamectin pharmaceutical solution three-dimensional fluorescence spectrum
(a): Formulation 1; 1: Ex/Em=270/291.5 nm, Int.=2 901.22; (b): Formulation 2; 1: Ex/Em=270/291 nm, Int.=2 774.06

Fig. 5. Fitting curve of abamectin preparation solution
(a): Formulation 1; (b): Formulation 2

Fig. 6. The linear fit curve between the predicted value and the measured value in the validation set of abamectin preparations
(a): Formulation 1; (b): Formulation 2