Figure 2: Chromatogram of (a) ANC: KPF6 (0.1 M, pH.3.2) (b) MeOH:KPF6 (0.1 M, pH.3.2) (c) EtOH:KPF6 (0.1 M, pH.3.2) (d) ANC:KH2P (0.1 M, pH.3.2) （e）ANC:KPF6 (0.5 M, pH.3.0, 60:40), (f) ANC: KPF6 (0.1 M, pH.3.0, 80:20), (g) ANC: KPF6 (0.1 M, pH.3.0, 40:60), (h) ANC: KPF6 (0.1 M, pH.3.0, 20:80),