Fig. 2. Chromatogram of a mixed standard solution using the optimized gradient program of Table 2. The concentrations of all colorants were 10 mg L−1. Identification of the peaks and their corresponding tR are given in Table 3.
Fig. 2. Chromatogram of a mixed standard solution using the optimized gradientprogram of Table 2. The concentrations of all colorants were 10 mg L−1.Identification of the peaks and their corresponding tR are given in Table 3.