Quality & Testing

Quality & Testing | W.E.R Pep T

Quality & Testing

Every batch tested before it ships.

Independent HPLC and mass spectrometry verify the purity and identity of each research peptide we sell. The results are documented in a certificate of analysis you can request for any batch.

  • Third-party lab
  • Batch-level results
  • Research use only
Certificate of analysis Sample layout
HPLC purity 99.2%
Passed
Method
RP-HPLC
Identity
Mass spectrometry
Batch
Listed on every COA
HPLCPurity of every batch
MSMolecular identity confirmed
3rd partyIndependent lab verification
COAAvailable for each product

Our testing

Four checks behind every vial

Each test answers a different question about the peptide you receive.

HPLC purity

High-performance liquid chromatography measures how much of the sample is the target peptide and how much is not.

Mass spectrometry

Confirms the molecular weight, so the compound in the vial matches the compound on the label.

Certificate of analysis

Results are written up per batch, with the method, the findings and the batch reference in one document.

Batch traceability

Every vial ties back to its batch, so any result can be checked against what you were sent.

Batch journey

From production to your lab

A batch only moves forward when it passes the step before.

  1. 1

    Batch produced

    Each batch is assigned a reference number at the start.

  2. 2

    Sample sent

    A sample goes to an independent laboratory.

  3. 3

    HPLC and MS

    Purity and identity are measured and recorded.

  4. 4

    Review

    Results are checked against our specification.

  5. 5

    Release

    Passing batches ship. A failed batch does not.

Standards

What we check and what counts as a pass

Every COA reports these parameters, so you can compare the result against the specification yourself.

ParameterMethodSpecification
PurityHPLC≥ 98%
IdentityMass spectrometryMatches expected mass
AppearanceVisual inspectionWhite to off-white powder
TraceabilityBatch recordBatch number on COA and label

Request your certificate of analysis

Enter the product name and batch number from your vial and we will send the matching COA to your email.

FAQ's

Testing questions, answered

Every batch is verified through third-party HPLC and mass spectrometry before it ships, and a certificate of analysis is available for each product on request.

HPLC separates the sample into its components and reports the share that is the target peptide. Mass spectrometry then confirms that peptide has the expected molecular weight.

The batch number is printed on the vial label. Use it in the request form above so we can match the correct report.

A batch that does not meet specification is not released for sale.

No. All products are sold strictly for laboratory research use and are not intended for human or veterinary consumption.

Research Materials. Analytical Precision.

Browse the range and request the COA for anything you order.

Research Products For laboratory research use only. Not for human consumption.
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