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. 2018 May 2;23(5):1065. doi: 10.3390/molecules23051065

Figure 1.

Figure 1

Comparison of Van Deemter curves of atorvastatin obtained using ethanol or acetonitrile in mobile phases. Xbridge BEH Shield RP18 (50 × 4.6 mm i.d., 2.5 µm); Chromolith (SpeedROD RP18, 50 × 4.6 mm i.d., 2 µm); YMC-ODS-AQ (50 × 4.6 mm i.d., 3 µm); Hypersil GOLD (50 × 4.6 mm i.d., 1.9 µm). Isoeluotropic mobile phases: EtOH/formic acid (pH 2.5, 25 mM) in proportions 40/60 (v/v) for YMC column; 38/62 (v/v) for Xbridge and Hypersil columns; and 35/65 (v/v) for Chromolith column. HETP: height equivalent to a theoretical plate. Similar to Reference [42].