PeptideStack
5.2kquestions
20kanswers
220users

How do I reconcile 99.4% from PeptideMeter with 98.2% from the supplier?

Asked 4 May 2024Modified 2.2 years agoViewed 40k times
37

The particulars: 99.4% · PeptideMeter · 98.2%.

Something has gone wrong and I would like to know how badly before I decide what to do.

Nothing else in the setup changed, which is what makes this puzzling.

What is the differential here, and which test discriminates between the options?

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

788 questionsbatch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questionscoa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
shareeditfollowflag
RO
askedrae_oyelowo21k384 May 2024

No answers yet

This question has not been answered. It has been viewed 40k times, which suggests the question is of interest and the answer is not obvious. If you can answer it with a source or a worked calculation, it will be read. See how to ask and answer.
Sponsored

PeptideMeter - Independent Peptide Analytics

Aggregated, published test results and vendor ratings built from submitted batches. Methodology stated, dataset browsable, no listing fees.

Browse results

Your answer

Ask PeptideStack is a static archive. Posting is closed, but the norms are worth stating: answer the question that was asked, show your working, cite the trial or the certificate, and say plainly where the evidence runs out.

Not medical advice. Research-use-only compounds are not approved for human use.