Injection valves with 20 μL sample loops were used. The HPLC analysis was performed with a commercial C18 column (4.6 * 150 mm, 5 μm) purchased from RStech Co. (Daejeon, Korea).
Injection valves with 20 μL sample loops were used. The HPLC analysis wasperformed with a commercial C18 column (4.6 * 150 mm, 5 μm)purchased from RStech Co. (Daejeon, Korea).