Research Article

Disperse Solid-Phase Extraction Cleanup for the Determination of 1-Deoxynojirimycin in Mulberry Leaves with Ultraperformance Liquid Chromatography-Tandem Mass Spectrometry

Figure 1

Real sample test chromatograms for the quantitation ion of 1-DNJ with the four types of column (c = 500 ng/mL). Column 1: Agilent ZORBAX Eclipse Plus C18, 2.1 × 50 mm 1.8 μm, column 2: Waters ACQUITY UPLC® BEH HILIC, 2.1 × 50 mm 1.7 μm, column 3: SunShell C18, 4.6 × 100 mm 2.6 μm, and column 4: Pinnacle II Amino, 4.6 × 150 mm, 3 μm.