Maintaining high levels of drug quality and safety is priority for the pharmaceutical industry. Pharmacopoeias have documented these standards as officially acknowledged pharmaceutical rules.

Ion exchange (IEX) chromatography is a technique that is commonly used in biomolecule purification. It involves the separation of molecules on the basis of their charge. This technique exploits the ...

IN two previous communications, we 1,2 have shown that a mixture of phenobarbitone, acetophenetidin, salicylate and p-acetylaminophenol can be separated in 60–75 min. by a combined technique of ...

WE have found that, when a mixture containing barbiturate, salicylate and acetophenetidin is subjected to chromatography on Whatman No. DE20 cellulosic ion-exchange paper in dilute ammonia solution, a ...