How do you determine that the concentration of each vial of the peptides is accurate enough to measure sensitivity specs of mass spectrometers?
[top] To insure that each vial has the same amount of peptide in it, we quantitate the digests with RP-HPLC with UV at 200nm and provide this information with each purchase. This is important because to measure the sensitivity of a Mass Spectrometer, you have to be able to calibrate against the known amounts in our vials. Mass spectrometer manufacturers use our peptides to measure sensitivity worldwide.
