Fig. 7
From: Electrochemical sensing of vitamin B6 (pyridoxine) by adapted carbon paste electrode

Calibration curve for Vitamin B6 using HPLC. Inset: the chromatograms of Vitamin B6 (tR/4.43), obtained by HPLC (column: 4.6-mm × 15-cm; packing L1; mobile phase/Acetonitrile, tetrahydrofuran, and Buffer (25:20:955), adjusted with glacial acetic acid to a pH of 4.5).