Quality control and analytical testing
The analytical programme behind this catalogue: appearance, HPLC purity against a 99.0% specification, ESI-MS identity confirmation, quantitative HPLC, USP <71> sterility and ICP-MS heavy metals.
What is tested, and with which method
Every lot published on this site is released against a certificate of analysis that reports six determinations. The method behind each one is stated on the certificate.
Appearance is assessed visually. Purity is measured by HPLC with UV-VIS detection at 214 nm against a specification of not less than 99.0%. Identity is confirmed by electrospray ionisation mass spectrometry, which reports the measured mass against the expected mass. Analysed quantity is determined by quantitative HPLC within a 10% tolerance of the labelled target. Sterility follows USP <71>. Heavy metals are screened by inductively coupled plasma mass spectrometry.
- Appearance — visual assessment, reported per lot on the certificate
- Purity — HPLC, UV-VIS detection at 214 nm, specification not less than 99.0%
- Identity — ESI-MS, measured mass reported against expected mass
- Analysed quantity — quantitative HPLC, within 10% of the labelled target
- Sterility — USP <71>
- Heavy metals — ICP-MS
Who performs the testing
The certificates published on this site were issued by Lens Bio Lab, an independent analytical laboratory, and are signed by its analytical chemists. The current lot records carry a sample receipt date of Sep 21, 2026 and a test date of Sep 26, 2026.
The certificate for each product is published on its own product record, and the full set is listed on the certificate of analysis page. The lot number on the product record is the same lot number carried on the certificate, so the two can be reconciled directly.
What is not claimed
This site publishes no GMP, ISO, FDA or other certification claim, because no certificate of that kind is held for these materials. It publishes no purity figure for a product whose certificate does not state one — Liraglutide, Cagrisema and SLU-PP-322 are published without a purity figure for exactly this reason — and no CAS number, molecular formula or amino-acid sequence, because the certificates do not carry those fields.
No stability, shelf-life, sterility-in-use, weight-management or clinical claim is made. Storage and handling requirements may vary by lot, so the certificate should be read before use, and suitable personal protective equipment and established laboratory handling procedures apply.
Research-use boundary
All materials are supplied for non-clinical laboratory research only. They are not medicines, supplements, weight-management products or treatments, and this site describes no human or veterinary use, dosage, benefit or effect. The requesting organisation is responsible for its own facilities, training, institutional approvals and regulatory compliance.