positive charged filters for pyrogen removal

where do you guys get positive charged filters for pyrogen removal preferably syringe

What are you trying to filter exactly?

Just test E brewed at 350 mg/ ml In mct oil 2 and 20 on the ba and bb. I have reason to believe it has endotoxin contamination and rather then throw away 10 vials of it I wanna try filtering it, I know pyrogens and endotoxins are a byproduct of sterilizing, it's produced when the bacterial cell wall is being broken down and is small enough to pass through a .2 micron filter but these are normally negatively charged so I have heard of some people using positive charged filters to get the endotoxins to bind to the filter. Has anyone attempted this and where did you get your filters

The Lps layer of the cell wall typically is considered a pyrogen when lysed.

If you feel more comfortable you can pm me, why do you feel you have contaminated gear?

I'll look up the membrane selectivity here shortly and get back to you.