Which compound
was detected?
Mass spectrometry can compare detected molecular signals with those expected for a named peptide. The report should state the method and its identity finding.
What to check on the COA
Read: the compound name, sample identifier, analytical method and reported identity result. LC-MS or LC-MS/MS may be used; rely on the method actually listed.
Keep separate: an identity finding does not establish the amount of peptide or replace other quality tests.