Ion exchange method for determination of caffeine in presence of antipyrine and phenacetin.
D000632:Aminopyrine / Q000032:analysis*; D000983:Antipyrine; D002110:Caffeine / Q000032:analysis*; D006296:Health Services; D007474:Ion Exchange; D010615:Phenacetin / Q000032:analysis*
D000632:Aminopyrine; D002110:Caffeine; D010615:Phenacetin; D000983:Antipyrine
ACETOPHENETIDIN/determination; AMINOPYRINE/determination; CAFFEINE/determination