Cefalexin: Apparatus: CoMetro High Performance Liquid Chromatograph-Gradient System Column: Kromasil C18, 5u 150 × 4.6mm Chromatographic conditions: Mobile phase: water: methanol: 3.86% sodium acetate: 4% acetic acid solution = 740: 240: 15: 3 Detection wavelength: 254nm Flow rate: 1.0ml / min
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