Method
How we test
One panel, run per lot, at an independent ISO 17025 accredited laboratory.
Testing happens per lot, not per shipment and not per supplier claim. A lot is released only after its certificate comes back complete and within specification.
We publish the certificate as the laboratory issued it: the method, the result, the measurement uncertainty, the limit, the chromatogram, the laboratory's report number and the lot number. Where a result is a number, we report the number.
The panel
| Test | Method | Specification |
|---|---|---|
| Purity | RP-HPLC, UV detection at 214 nm | Greater than 98% |
| Identity | HPLC retention time against a certified reference standard | Matches |
| Quantity | HPLC-UV | Label claim within the stated tolerance |
| Bacterial endotoxin | Kinetic LAL, USP <85> | Within the limit on the certificate, in EU/mg |
| Sterility | USP <71> | No growth, where run |
| Heavy metals | ICP-MS for As, Cd, Pb and Hg | Not detected, where run |
| Residual solvents | GC-MS, USP <467> | Within limits, where run |
| Chromatogram | Full HPLC trace | On the certificate |