We published "Separation of highly hydrophilic nicotinamide metabolites using a COSMOSIL PBr column" in MethodsX, 2023, 10. 102061.DOI: https://doi.org/10.1016/j.mex.2023.102061Abstract: Highly hydrophilic compounds such as nicotinamide metabolites are very difficult to separate via high-performance liquid chromatography...

We published " Separation of nicotinamide metabolites using a PBr column packed with pentabromobenzyl group modified silica gel" in Analytical Biochemistry. 2022, 655, 114837.. https://doi.org/10.1016/j.ab.2022.114837 The following products were used in this study. COSMOSIL PBr Packed Column: https://www.nacalaiusa.com/...