How the parts work together
Chromatography separates components over time. The mass spectrometer measures signals from those components. The laboratory interprets them against the expected material and the method used.
What to review
Check the sample identity, method, reported findings and supporting spectra or chromatograms. Ask the issuing laboratory what its identification method can distinguish.
What it does not establish
An LC-MS identity finding does not establish measured content in every vial, all contaminants, sterility or clinical suitability. Separate questions need appropriate evidence. Scale does not test sterility.