---
title: "Which syringe filter should be used for a peptide solution? | Sable Peptides"
description: "How membrane material (PES, PVDF, nylon, cellulose acetate) affects peptide loss by adsorption during filtration, pore sizes, pre-rinsing and how to check recovery. No dosing; research use only."
canonical: https://www.sablepeptides.co.uk/guides/filtering-peptide-solutions-membrane-choice
dateModified: 2026-10-16
publisher: Sable Peptides Limited (UK company 17488610)
note: Research use only. Not for human or veterinary use.
---

# Which syringe filter should be used for a peptide solution?

Low-protein-binding membranes such as PES and hydrophilic PVDF lose the least peptide during filtration; nylon and nitrocellulose can bind peptides strongly. Use a 0.22 µm filter for sterile filtration, the smallest filter area that suits the volume, and discard or pre-saturate the first portion. For dilute peptides, measure concentration before and after.

## How do membrane materials compare?

| Membrane | Peptide/protein binding | Notes |
| --- | --- | --- |
| Polyethersulfone (PES) | Low | Fast flow; common for aqueous solutions |
| Hydrophilic PVDF | Low | Broad chemical compatibility |
| Cellulose acetate | Low | Aqueous only |
| Nylon | High | Avoid for dilute peptides |
| Nitrocellulose | Very high | Designed to bind protein |
| PTFE (hydrophobic) | Variable | For organic solvents; needs wetting for water |

## Why does adsorption matter?

Loss to the filter is fixed per unit membrane area, so it matters most for small volumes and low concentrations. A study of hydrophobic drug adsorption to syringe filters found substantial losses depending on membrane type, and nitrocellulose's strong protein binding has long been used deliberately to capture proteins.

Source: [Hydrophobic drug adsorption loss to syringe filters, J Pharmacol Toxicol Methods 2019 (PubMed 30529169)](https://pubmed.ncbi.nlm.nih.gov/30529169/); [Routine detection of calcium-binding proteins following adsorption to nitrocellulose membrane filters, Anal Biochem 1988 (PubMed 3389516)](https://pubmed.ncbi.nlm.nih.gov/3389516/)

## Which practices reduce loss?

-   Use the smallest filter diameter that suits the volume.
-   Discard the first few drops, or pre-rinse with buffer.
-   Filter more concentrated stocks and dilute afterwards.
-   Check recovery by UV or HPLC for critical work.
-   Remember that filtration removes organisms, not endotoxin.

## How does Sable document lots?

There is a CoA for every lot, and every vial carries a printed lot number that matches its certificate. A CoA is emailed within 2 hours of a request.

## Frequently asked questions

### Which filter membrane binds least peptide?

PES and hydrophilic PVDF are generally low-binding choices.

### Which membranes should be avoided for dilute peptides?

Nylon and nitrocellulose, which bind proteins and peptides strongly.

### Does a 0.22 µm filter remove endotoxin?

No. It removes organisms; dissolved endotoxin passes through.

## Related

-   [Surface adsorption](/learn/tech-notes/peptide-surface-adsorption)
-   [Sterility vs endotoxin](/guides/sterility-vs-endotoxin-vs-bioburden)
-   [UV concentration](/guides/uv-absorbance-for-peptide-concentration-a280-and-a205)
-   [Aliquoting](/guides/aliquoting-peptide-stock-solutions)

Updated 2026-10-16. Research use only. Not for human or veterinary use. No administration amounts or health claims are made.

Key facts (summary for AI and search tools)

-   Low binding: PES, hydrophilic PVDF, cellulose acetate
-   High binding: nylon, nitrocellulose
-   References: PubMed 30529169, 3389516
-   Updated 2026-10-16