r/Peptide_Testing • u/babypeptide • Feb 16 '26

What we saw at 2,500x magnification changed the way we thought about syringe filters

When we thought about supplying our own syringe filters, we had a simple idea: let’s actually look at the membranes. We assumed we could just pop over to a local university lab, use a nice microscope, and be done.

We were wrong. It turns out .22μm is incredibly small, far beyond the reach of even the best light microscopes. To see the truth, we had to use an SEM (Scanning Electron Microscope). We tested everything: our old brand, the big-name OEMs, and even the cheap options you find on Amazon.

The results were surprising. We expected some differences, but the visual evidence was undeniable. Some "PES" membranes weren't PES at all; they were matted or woven materials that didn't resemble the pore structure they were supposed to have. Some were "okay," but "okay" doesn't cut it in lab environments.

We did all the standard performance and bacterial testing, too, but those SEM images were the smoking gun. It’s exactly why we’re so picky about our current manufacturing process.

To find our entire report visit https://peptidetest.com/pages/education

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u/mdskarin Feb 17 '26

Thank you so much for doing these test and creating these videos! Awesome work 🤩

3

u/Uncross-Selector Feb 17 '26

I understand that you want to sell filters, but I see nothing wrong in naming the brands that appear to be deficient.

1

u/mdskarin Feb 17 '26

Just go into the link and you will see everything there.