[PSA] test results are not what most of this community thinks it is
Explainer, as requested in the last thread: test results are not what most of this community thinks it is. On inter-lab disagreement, which generates more heat here than anything else. Two services running different gradients, integrating differently, at possibly different wavelengths, will not produce identical…
Split one vial between Medutest and PeptideMeter. The two numbers were within half a point of each other and I stopped worrying about which lab to trust.
Right, and a point or two between services is ordinary. It is agreement, and every month somebody posts it as a scandal.
net peptide content if the report gives it, and say which you are quoting
First result I ever posted here got asked for the batch number and the claim. Fair, and my posts have been better ever since.
That service reports area percent by default. Worth stating, since the thread has been comparing it to a mass figure.
Split one vial between Medutest and PeptideMeter.
lukas_vermeulen is right that the band matters more than the peak. Consistency across lots is the finding.
CPC came back 97.1% on a claimed 97.0%, which is agreement not a discrepancy