Procainamides (1)
Procainamides were analyzed using RSpak 
DE-613 (a column 
for reversed phase chromatography) with alkaline eluent. 

Sample : 8micro-L, 0.1% each
1. 
Salicylic acid
2. 
Caffeine
3. 
N-Acetylprocainamide
4. 
Procainamide
Column       : Shodex RSpak DE-613 (6.0mmID*150mm)
Eluent       : 50mM Na2HPO4(pH9.7)/CH3CN=70/30 
Flow rate    : 1.0mL/min
Detector     : UV(254nm)
Column temp. : 60deg-C