OBJECTIVE To establish an HPLC-ELSD method for the determination of xylooligosaccharide in chitooligosaccharide xylooligosaccharide capsules by amide hydrophilic interaction chromatography. METHODS The chromatographic separation was achieved on a Waters XBridge Amide column(4.6 mm×250 mm, 3.5 μm) by a gradient elution program with acetonitrile-0.2% triethylamine as the mobile phase. The flow rate was 1.0 m L·min-1, injection volume was 20 μL, column temperature was 45 ℃. RESULTS The calibration curves of xy...