Research Article

Simultaneous Determination of Ternary Mixture of Carboxin, Chlorpyrifos, and Tebuconazole Residues in Cabbage Samples Using Three Spectrophotometric Methods

Figure 10

Successive derivative ratio spectra of 1, 3, 5, 8, 10, 12, 15, 20, 25, 30, 40, and 50 μg/mL of chlorpyrifos in methanol at Δλ = 2 nm.