Quality & testing
Anyone can print a purity figure on a label.
We publish the analysis for each batch so the claim can be checked against the certificate, not taken on trust.
Release specification
Every batch must meet specification before it is released.
| Test | Method | Specification |
|---|---|---|
| Identity | Mass spectrometry | Confirmed |
| Purity | Reversed-phase HPLC | Stated on the batch certificate |
| Appearance | Visual | White lyophilised powder |
| Elemental impurities | ICP-MS | Within limits |
| Endotoxins | LAL | Within limits |
The live site shows the purity specification as a bracketed placeholder. It is stated here as “on the batch certificate” until LS Peptides confirms the figure.
What the methods do
Reversed-phase HPLC
Separates the sample's components by how strongly they bind to the column. The main peak's share of the total signal gives the purity figure.
Mass spectrometry
Measures molecular mass to confirm that the compound in the vial is the compound on the label.
ICP-MS and LAL
ICP-MS detects trace elemental impurities. The LAL test screens for bacterial endotoxins.
Our testing partner
Janoshik Analytical.
An independent third-party laboratory carries out the HPLC and mass spectrometry for every batch. Their certificate is the document behind every figure on this site.
Release process
- 01
Material intake
Raw material is quarantined and identity-checked against supplier documents.
- 02
In-house screening
Preliminary purity and appearance checks are recorded.
- 03
Third-party analysis
Independent HPLC and mass spectrometry by Janoshik Analytical.
- 04
Certificate issued
Results are compiled into a batch-specific certificate of analysis.
- 05
Release
Only batches meeting specification are packed. Nothing ships until its analysis is reviewed and signed off.
Storage and stability
Material is supplied lyophilised and sealed, and should be kept at −20 °C, away from light and moisture. Each certificate states storage conditions and a retest date.
What LS Peptides is not
We supply laboratory research materials, not medicines, pharmacy products or clinical services. We hold no marketing authorisation, do not supply for human or veterinary use, and decline enquiries about administration or use on living organisms.
For laboratory research use only. Not for human or veterinary consumption.