Analysis and certificates

What is measured, who measures it, and how the certificate you receive connects to the vial in your hand.

What is measured

Identity: ESI-MS; Electrospray ionisation mass spectrometry, compared against the theoretical mass calculated from the molecular formula.
Purity: RP-HPLC 214 nm; Reverse phase HPLC with detection at 214 nm. Purity is reported as the main peak expressed as a percentage of total peak area.
Endotoxin: LAL; Limulus amebocyte lysate screening, reported in endotoxin units per milligram of material.
Appearance: Visual; Cake integrity and colour checked against the specification for the compound before the batch is released.

How a batch is released

Quarantine on arrival: Incoming material is held separately and does not enter saleable stock. Nothing is despatched from a batch that has not completed testing.
Sample and test: A sample goes to an analytical laboratory we do not own. Testing our own material and certifying it ourselves would make the certificate worth very little.
Compare against specification: Results are checked against the published specification for that compound. A batch that misses specification is not released and is not repackaged into another lot.
Release and label: The batch is assigned a lot code, that code is printed on every vial, and the certificate issued for the batch carries the same code.

High performance liquid chromatography instrument in an analytical laboratory

How a trace is read

Illustration of the method, not a measurement. The tall central peak is the compound. The smaller peaks are everything else in the sample. Purity is the area under the main peak as a share of the total.

Released lots

No lot certificates are published here yet. We publish a lot record only once the analytical laboratory has issued the certificate for that batch, so this page will stay empty rather than show a specimen or an example.

In the meantime the certificate for the batch you are sent ships with your order. If you need it in advance for a purchasing or ethics review, ask us for the current lot certificate against the catalog number and we will send it before you order.

Request a lot certificate

In vitro laboratory research use only. Not for human or veterinary use. Harlow Sciences does not supply dosing, reconstitution or administration guidance, and does not sell administration supplies. See the research use policy.