Sample :
1. Acetylsalicylic acid, Aspirin
2. Caffeine
3. Salicylamide
4. Aminopyrine
5. Phenacetin
Column : Shodex RSpak DS-613 (6.0 mm I.D. x 150 mm) Eluent : 1/15 M Phosphate buffer (pH7.2)/CH3CN=75/25 Flow rate : 1.0 mL/min Detector : UV (254 nm) Column temp. : 40 ℃
