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. Author manuscript; available in PMC: 2009 May 11.
Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2008 Nov 1;875(1):304–316. doi: 10.1016/j.jchromb.2008.06.028

Fig. 5.

Fig. 5

Sequential optimization of acid/base ratio for the simultaneous enantioseparation of nadolol (N1, N2, N3, N4) and labetalol (L1, L2, L3, L4). The mobile phase contains various ratios of acetic acid and triethylamine with methanol and acetonitrile held constant at 40/60% (v/v). All other conditions are the same as Fig. 4 except the electrical field strength was held constant at 500 V/cm.