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(A) Mobile phase: 0.01 M phosphoric acid, pH adjusted to 3.0 using 10% potassium hydroxide, flow rate 0.50 mL/min, column, ultrahydrogel, 300 mm×7.8 mm, 1000 Å and detector wavelength set at 205 nm. (B) Mobile phase: 0.1 M ammonium dihyrogen phosphate, flow rate 0.50 mL/min, column, ultrahydrogel, 300 mm×7.8 mm, 1000 Å and detector wavelength set at 205 nm.
