Food, drug and model mix analysis by organic monolithic columns based on heterocyclic monomers

This paper presents examples of separation on monolithic columns prepared by two different methods: copolymerization and post-modification. In the first method, monoliths were prepared from styrene, divinylbenzene, and heterocyclic nitrogen-containing monomers. In the second, a styrene/divinylbenzene/4-vinylbenzyl chloride copolymer was obtained and in situ modified with 1-methylimidazole. It has been shown that monolithic columns are capable of separating macromolecules and low-molecular compounds. A comparison was made between a styrene/divinylbenzene/1-vinylimidazole copolymer column and a ProSwift™ RP-3U monolithic column. It has been established that a monolithic column based on 1-vinylimidazole is capable of separating proteins and low molecular weight test substances. However, the ProSwift™ RP-3U column is only capable of separating proteins. Separation examples are given: a test mixture of proteins, natural milk proteins, carbohydrates and drugs on a column with a sorbent based on styrene/divinylbenzene. A modified column was used to study the content of salicylic acid in medicinal preparations containing acetylsalicylic acid.