Mar 29, 2020 · The assay was carried out by High Performance Liquid Chromatography (HPLC, Aijiren II with binary pump, variable wavelength detector, refrigerated autosampler and integrated column compartment; Aijiren Technologies, Santa Clara, CA, USA) with mobile phase A (0.1 M NaH 2 PO 4 buffer) and mobile phase B (acetonitrile: H 2 0 1:1 V/V