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

Figure 5

First derivative spectra of mixture containing 1, 2, 3, 5, 10, 15, 20, 25, and 30 μg·mL⁻¹ pyriproxyfen and 3.0 μg·mL⁻¹ chlorothalonil.