HPLC Method for Analysis of Narrow Fractions of Polylysine on BIST B+ by SIELC Technologies.
Separation type: Bridge Ion Separation Technology, or BIST™ by SIELC Technologies
High Performance Liquid Chromatography (HPLC) Method for Analyses of Narrow Fractions of Polylysine
Polylysine includes a large group of similar polymers with various uses. Some are used as food preservatives, while others are used for drug delivery in pharmaceuticals. Polymers with charged monomeric units, such as polylysine, are often difficult to separate using typical ion-exchange chromatography due to very strong and often irreversible interactions with the oppositely charged column surface. Therefore, an extremely high concentration of the buffer, up to several molar, is usually needed to facilitate an ion-exchange process. This high buffer concentration, however, is not desirable because of the significantly increased viscosity of the mobile phase and the salt formation in the pump components. With BIST™, these polymers can be separated and retained with relatively weak buffers (in the mM regime) and a fairly simple gradient. Using this new and unique analysis method, polylysine can be retained and UV detected at 210 nm.
|Column||BIST B+, 4.6×50 mm, 5 µm, 100A|
|Mobile Phase||Gradient MeCN|
|Buffer||H2SO4 – 0.2%|
|Flow Rate||1.0 ml/min|
|Detection||UV 205 nm|
|Peak Retention Time||2.9 min|
|Class of Compounds||Peptide, Homopolypeptide|
BIST™ columns offer a unique and effective way to achieve separations that were traditionally challenging or even impossible with other HPLC columns. With the use of a special mobile phase, these ion exchange columns provide very strong retention for analytes with the same charge polarity as the stationary phase, unlocking new chromatography applications. What makes BIST™ columns stand out is their proprietary surface chemistry, which results in superior selectivity, resolution, and sensitivity. These columns offer a simple, efficient solution for a variety of analytical challenges, making them an excellent choice for researchers and analysts across many different fields. To learn more about the technology that powers BIST™ columns and to explore related applications, check out https://BIST.LC.Select options