Everything you need to know
Batch testing means testing one or more vials drawn from a single lot so the certificate describes that lot. It is how a vendor, clinic or group buyer gets a result tied to the batch on the label, and it has to be repeated for each new batch.
What is peptide batch testing?
Batch testing is testing vials sampled from one production lot, so the result is evidence about that lot and carries its batch number. A certificate from an earlier batch says nothing about the next one, because fill amount and purity can change between batches even from the same supplier. For a vendor, the batch is the unit of risk and the unit of testing. Each certificate records the batch number, the date received and the results for the vials that were tested.
How many vials from a batch should be tested?
There is no rule for research peptides, so it is a risk decision. One vial tells you about that vial and gives a first reading on the batch. Testing three or more vials from different positions in the batch shows whether the fill is consistent, which is where batches most often go wrong. A common manufacturing convention for sampling containers is the square root of the number of units plus one, but that is a convention for controlled production, not a requirement here. If only one vial can be tested, pick it at random. Why one vial does not cover the kit.
What does batch testing cost?
At Prodigy Labs the first vial of a lot is the normal package price, $225 for identity, purity and content. Additional vials from the same lot can be added as conformity vials at $75 each: they run in the same sequence for identity, purity and content and appear on the same certificate. Volume pricing applies automatically by the number of samples in a submission: 5 to 9 samples 5% off, 10 to 19 samples 10% off, 20 to 99 samples 15% off, and 100 or more at a 25% programme rate. Final rates are confirmed on quote. There is no order minimum. Pricing and the batch estimator.
How long does a batch take?
The HPLC Package is 5 to 7 business days from receipt, and a batch of vials normally runs in one sequence, so more vials do not usually mean proportionally more time. Injectable safety tests add time: 7 to 10 business days with endotoxin, heavy metals and bioburden, and about 15 business days when the 14-day USP <71> sterility test is included. Large or recurring batches are scheduled in advance so the turnaround is agreed before the samples ship.
What does a batch certificate show?
For each vial tested: identity against a reference standard, purity by HPLC area percent, and content in milligrams per vial against the label claim. The certificate also records the batch or lot number, the reference standard lot used, and a QR code that resolves to a public verification record. A vendor can publish that link so a buyer can confirm the certificate with the laboratory directly. How verification works.
Do I need to test every batch?
If you sell, formulate or dispense the material, yes: a certificate only describes the batch it was issued on, and reusing an old certificate for new stock is the most common reason a certificate does not match a vial. If you are buying for your own use from an unchanged supplier, periodic testing gives you a trend, and a new supplier or a change in appearance, solubility or price is a reason to test again. What a batch number does and does not prove.