PEPTIDE TESTING
Peptide Testing Services
Confirm peptide identity, net peptide content (assay), purity, and key quality attributes with experienced analytical chemistry and microbiology support.
Peptide products can vary significantly from lot to lot. Our testing helps you verify label claims, screen suppliers, and document quality attributes for research and quality screening programs.
Identity (ID)
Confirm the target peptide using best-fit analytical approaches based on sample type and feasibility.
Net Peptide Content (Assay)
Quantifies how much peptide is present in the sample (commonly referred to as assay or net peptide content).
Purity (HPLC Chromatographic Purity)
Estimates purity based on the main peak area relative to related peaks (method-dependent).
TFA / Acid Residue (Counter-Ions)
Measures residual acids/counter-ions that can remain from synthesis and purification (includes TFA and acid residue testing).
Water Content (Karl Fischer)
Measures moisture/water content to support handling and stability decisions.
Heavy Metals (ICP-MS)
Quantitative screening for elemental impurities (e.g., Pb, Cd, As, Hg and other metals) using ICP-MS to support supplier qualification and quality screening.
Microbial Limits (Nonsterile Products)
For non-sterile peptide products: screens total aerobic count and total yeast/mold (and specified organisms when needed).
Sterility Testing (Sterile Products)
For products represented as sterile: sterility testing using applicable compendial-style approaches.
Bacterial Endotoxins (LAL)
Detection of bacterial endotoxins using LAL-based methods to support peptide quality screening and risk assessment.
How it Works
- Tell us your sample type (powder, solution, vialed product) and what claims you want to verify.
- We confirm the best-fit testing plan and issue a quote.
- You ship samples with simple chain-of-custody instructions.
- We report results in clear tables with method notes.
Get a Fast Quote
To quote quickly, include:
- Peptide name (or code) and label claim
- Sample matrix (powder, solution, buffer/excipients)
- Tests requested (ID, assay, purity, TFA/acid residue, Karl Fischer, microbial limits, sterility)
- Number of lots and desired turnaround time