Figure 1 e (A) Chromatograms of the analytes under different pH conditions, (B) effect of different pH on the signal response
of the analytes, (C) chromatograms of the analytes using different concentrations of ammonium acetate solution, and (D)
chromatograms of the analytes using different proportions of ammonium acetate solution in the mobile phase
1ddicyandiamide, 2dcyromazine, 3dmelamine.