小中大用醋酸的条件也可以的,是不是其他方面的问题?
Column Cogent Diamond Hydride™, 4µm, 100A
Catalog No. 70000-15P-2 Dimensions 2.1 x 150 mm
Solvents A: DI water + 0.1% acetic acid B: Acetonitrile + 0.1% acetic acid
Gradient Time %B
0.0 100 15.00 50
Post time 5 min Flow rate 0.4 mL/min. t0 = 0.8 min.
Sample Prep 1. Cyanuric acid 1.5 microg/mL: NEG (M-H)- 128.0102 m/z analyzed in Neg mode, RT = 1.278 min 2. Melamine 3 microg/mL: POS (M+H)+ 127.0727 m/z analyzed in Pos mode, RT = 11.260 min Detection ESI ?NEG for cyanuric acid and ESI ?POS for melamine: - Agilent 6210 MSD TOF mass spectrometer.