Research Peptide Quality: HPLC and MS for Every Batch
Quality you can check yourself
At MOLEVIA, quality is not a marketing claim. Every batch is measured, and its results are confirmed before it goes on sale.
| Parameter | MOLEVIA standard |
|---|---|
| Purity (HPLC) | 99% or higher |
| Molecular mass (MS) | Confirmed for every batch |
| Batch number | Printed on the vial |
Two tests that confirm every batch
HPLC: purity and impurity profile
High-performance liquid chromatography (HPLC) separates the components of a sample. It shows how much of the target peptide is present and what the other substances are, so you can judge the impurity profile as well as the headline purity figure.
MS: mass confirmation
Mass spectrometry (MS) measures molecular mass. It confirms that the vial contains the right compound, not just a substance with similar purity.
From manufacturer to dispatch
Traceability does not stop at the label. We keep control at every stage:
- HPLC and MS testing before a batch goes on sale.
- Batch number matching on the vial.
- Packing and dispatch with the batch number kept intact.
98% or 99%? The difference that matters
At first glance the gap looks small. In practice, 98% means 2% foreign substances, while 99% means 1%, which is half as many. In repeatable in vitro work, fewer impurities means fewer variables in the system, and results are easier to compare from one batch to the next. That is why 99% or higher is our standard.
If you prepare solutions, the concentration calculator can help, and our shipping page explains delivery options across Europe.
What does 99% purity on an HPLC result mean?
A 99% result means the target compound makes up 99% of the peak area on the HPLC chromatogram, and the remaining 1% is impurities and by-products. The higher the purity, the fewer foreign substances are present in your research material.
How should I store the lyophilised powder to keep its quality?
We keep lyophilised material in sealed vials under controlled temperature conditions. After opening, keep the vial tightly closed and follow the storage and reconstitution guidance on the product page.
Is the molecular mass confirmed for each batch?
Yes. The mass of every batch is confirmed by mass spectrometry (MS), and the measured value is compared with the expected value.
Read more
HPLC purity 98% vs 99%: what the percentage really tells you
HPLC purity 98% vs 99% explained: peak area, deletion sequences, TFA salt, net peptide content and why mass spectrometry matters for research peptides.
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Matching CAS numbers and formulas, storage, shipping and red flags. A practical checklist for choosing a research peptide supplier in the UK and EU.
Research guideResearch peptides explained: how to read a vial label for lab work
What research peptides are, what Research Use Only means and how to read a vial label: mass, lyophilised form, batch, storage and HPLC and MS.