Our quality commitment
At Lab Peptides France, quality is not an option but a fundamental requirement. Every peptide we offer undergoes rigorous multi-stage quality control, from synthesis through to final delivery.
Our multi-level verification process ensures that you receive research reagents meeting the highest industry standards, with full traceability and comprehensive documentation.
All our peptides exhibit a minimum purity of 98%, verified by High-Performance Liquid Chromatography (HPLC) and confirmed by Mass Spectrometry (MS).
Quality control process
Our quality chain comprises several independent verification stages:
Synthesis in a certified laboratory
Our peptides are synthesized in the United States in laboratories adhering to Good Manufacturing Practice (GMP-like) standards. Solid-Phase Peptide Synthesis (SPPS) ensures maximum precision in amino acid sequencing.
HPLC Analysis (Chromatography)
High-Performance Liquid Chromatography (HPLC) precisely determines the purity percentage of the peptide. This method separates the sample components and quantifies the proportion of the target peptide relative to any impurities.
Mass Spectrometry (MS)
Mass spectrometry confirms the molecular identity of the peptide by measuring its exact mass. This technique verifies that the amino acid sequence matches the expected structure.
Third-party laboratory verification
For complete transparency, our batches are also analyzed by Freedom Diagnostics Testing, an independent American laboratory specializing in the analysis of RUO peptides. This dual verification ensures the objectivity of results.
Verify on FreedomDiagnosticsTesting.comCertificate of Analysis (COA)
Each product comes with a Certificate of Analysis (COA) that documents the quality control test results performed on the batch.
What does a COA contain?
- Batch Number : Unique identifier enabling full product traceability.
- HPLC Purity : Purity percentage measured by chromatography, expressed as a percentage (e.g., 99.2%).
- Molecular Weight : Theoretical vs. observed molecular weight, confirming peptide identity.
- Appearance : Visual description of the product (white lyophilized powder, etc.).
- Analysis Date : Date on which the tests were performed.
- Storage Conditions : Storage recommendations.
Access to COAs
The COA for each product is accessible directly on the product page. You can view it online or download it as a PDF. To verify the authenticity of a COA, use the batch number on the Freedom Diagnostics Testing website.
View the catalogStorage and handling
Peptide quality also depends on proper storage. Here are our recommendations for maintaining the integrity of your reagents:
Lyophilized peptide
Store at -20°C (freezer)
Stability: 2-3 yearsReconstituted peptide
Store at 2-8°C (refrigerator)
Stability: 14-30 daysLight protection
Keep away from direct light
Avoid UV and sunlightHumidity
Protect from moisture
Airtight vialFrequently asked questions
What does 98% purity mean?
A purity of 98% means that 98% of the sample consists of the target peptide, with the remaining 2% being minor impurities (synthesis residues, truncated peptides). This purity level is the standard for research-grade peptides.
How can I verify the authenticity of a COA?
Each COA features a unique batch number. You can verify the authenticity of this number on the Freedom Diagnostics Testing website using their COA lookup tool.
What is the difference between HPLC and MS?
HPLC (chromatography) measures purity by separating sample components. Mass Spectrometry (MS) confirms the identity of the peptide by measuring its exact molecular mass. The two methods are complementary.
Are the peptides tested for endotoxins?
Yes, our peptides undergo a LAL (Limulus Amebocyte Lysate) test to detect the potential presence of bacterial endotoxins. Levels must be below the acceptable thresholds for research reagents.
How long can I store a lyophilized peptide?
A properly stored lyophilized peptide kept at -20°C and protected from light can remain stable for 2 to 3 years. Once reconstituted, it should be used within 14 to 30 days depending on the peptide.