HPLC and Mass Spectrometry: Different Questions

A concise explanation of what HPLC purity and mass-spectrometry identity results do and do not establish.

HPLC supports a purity result

High-performance liquid chromatography separates components in an analyzed sample. A detector response is used to calculate a reported area percentage under the stated method. The result is method- and sample-specific.

Mass spectrometry supports identity

Mass spectrometry measures mass-to-charge signals. Comparing an observed result with the expected molecular mass supports identity confirmation for the analyzed sample.

Why both are useful

A high HPLC area percentage does not by itself prove that the main peak is the intended compound. A matching mass signal does not by itself quantify purity. Used together, the methods address complementary analytical questions.

What neither establishes

These results do not by themselves establish sterility, endotoxin level, vial fill quantity, pharmaceutical grade, clinical safety, efficacy, or suitability for use in a human or animal. Pepta Labs does not claim those additional tests.