Three Different Spectrophotometric Methods for Simultaneous Determination of Pyriproxyfen and Chlorothalonil Residues in Cucumber and Cabbage Samples

Figure 8

Second derivative spectra of mixture containing 0.5, 1, 1.5, 2, 3, 4, 5, 6, and 7 μg·mL⁻¹ chlorothalonil and 10.0 μg·mL⁻¹ pyriproxyfen.