RP-HPLC
Purity Method
LC-MS
Identity Confirmation
≥95% Purity
Typical Threshold
5–10 days
TAT

Why Purity and Identity Matter for Research Peptides

Research peptides must meet minimum purity thresholds to support valid experimental results and responsible distribution.

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Purity by HPLC

RP-HPLC with UV detection quantifies the target peptide peak versus total area. Industry standard for purity claims.

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Identity by LC-MS

Mass spectrometric confirmation verifies the correct molecular weight and sequence fidelity.

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COA for Distribution

Distributors and researchers increasingly require a third-party COA for each lot.

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Rush Service

Need results in 2–3 business days? Rush service available.

What a Peptide Purity Report Covers

Standard testing package for research peptide lots.

How to Submit a Sample

Submitting takes less than 5 minutes. Most projects turn around in 5–10 business days from sample receipt.

1

Request Online

Fill out our sample intake form — sample type, quantity, and timeline. We confirm turnaround and quote within one business day.

2

Ship Your Sample

We'll send submission instructions and our San Diego shipping address. Most samples ship ambient or cold depending on stability requirements.

3

Receive Your COA

Results are delivered as a signed PDF COA within the agreed turnaround. Rush service (2–3 business days) available for urgent timelines.

Request a Test →

Frequently Asked Questions

What purity level do you test to?

We can quantify purity to whatever level your specification requires. Most research peptide lots target ≥95% or ≥98%. We report the actual measured purity with uncertainty.

Do you provide identity testing separately from purity?

Yes. You can order purity-only (HPLC), identity-only (LC-MS), or both. Most clients order the combined package for a complete COA.

How much sample do I need to submit?

Typically 1–5 mg is sufficient for combined HPLC purity and LC-MS identity testing.

Ready to Get Your COA?

Submit your samples and receive an ISO 17025 accreditation pending Certificate of Analysis. Results in 5–10 business days.