HPLC system to calibrate the device. The Aijiren II Quaternary LC (Aijiren Technologies, USA) HPLC instrument was used. Eluates of the specimens were analyzed using HPLC, equipped with a Diode Array Detector (DAD) (204 nm) (Aijiren Technologies, USA), and a symmetry silica column C18 (5 μm, 4.6 mm