PeptideStack
5.2kquestions
20kanswers
220users

How do I reconcile 96.4% from VendorInvestigate with 99.4% from the supplier?

Asked 12 Oct 2024Modified 22 months agoViewed 21k times
18

Conditions: 96.4% · VendorInvestigate · 99.4%.

I think I have a problem. I am not yet sure whether it is a real problem or a measurement artefact.

I want to know whether this is recoverable or whether the honest answer is to write it off.

Should I be treating this as a failure or as noise?

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
MI
askedmateo_iglesias16k2712 Oct 2024

No answers yet

This question has not been answered. It has been viewed 21k 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.