Research & references
Short, factual explainers on quality and analysis — Certificates of Analysis, HPLC purity, traceability and storage. No claims, only measurable facts.
Lyophilised (freeze-dried) peptides are most stable as a powder, kept cool and dark. General laboratory practice is storage at −20 °C for the longer term, protected from light and moisture. Storage conditions are physical-chemical in nature and say nothing about application.
Batch traceability means every product carries a unique batch number that points to one production run and its lab report. That lets you trace exactly which batch you received and which CoA belongs to it. RetaEU records the batch number on your order so the link survives after purchase.
HPLC (high-performance liquid chromatography) separates a sample's components and measures their relative amounts. Purity is expressed as a percentage of the total peak area. When a published report states a purity value, RetaEU shows that value. Some reports state only identity and amount.
A Certificate of Analysis records reported measurements, such as identity, amount and — if measured — purity. Published reports at RetaEU can be viewed by batch number. The original report determines which data is available.
Short & factual
- What does “for research use only” mean?
- It means the products are intended for laboratory and research purposes, not for human or animal consumption. No medical claims, dosing or usage instructions are given.
- How do I verify a batch?
- Enter the batch number from the packaging on the Lab page. If a published report is available, you can view it. Purity is shown only when it is stated in the report.
- What's the difference between HPLC and MS?
- HPLC quantifies purity as a percentage of peak area. Mass spectrometry (MS) confirms identity by measuring mass. The methods complement each other.