1-potassium dihydrogen phosphate
2-sodium dihydrogen phosphate
3-Ammonium acetate
|
| Figure 8: Typical HPLC chromatograms obtained from 20 μl injections
of Amlodipine Besylate Amlodipine impurity A, B, Atorvastatin Calcium,
Atorvastatin impurity A and C under chromatographic conditions of mobile
phase consisted of acetonitrile 35%: aqueous buffer 65% (PH= 5.5) was
pumped on Phenomenex kinetex 2.6 u C18 100A columns at a flow rate 1.2
ml/min and detected at 240 nm at constant temperature 40°C. (Ascending
order) 1-potassium dihydrogen phosphate 2-sodium dihydrogen phosphate 3-Ammonium acetate |