Polylysine is a small natural homo-polymer made out of amino acid lysine that is produced by bacterial fermentation. Due to the fact that it is a complex mixture of polymers with different molecular weight it is very hard to obtain a single sharp peak for this compound. Polylysine was successfully analyzed on a Primesep AP column in HILIC/cation-exclusion mode. Cation-exclusion mode on a Primesep AP column allows to obtain sharper peak. Presence of the basic groups on the surface of silica eliminated silanol interactions between basic sites of polylysine and acidic sites of Primesep AP column.
The Primesep family of mixed-mode columns offers a wide variety of stationary phases, boasting unprecedented selectivity in the separation of a broad array of chemical compounds across multiple applications. Corresponding Primesep guard columns, available with all stationary phases, do not require holders. SIELC provides a method development service available to all customers. Inquire about our specially-tailored custom LC-phases for specific separations.Select options