Separation provides one kind of evidence
High-performance liquid chromatography separates components under defined conditions. The reported chromatographic result depends on the method and detection used. Read that result with its chromatogram and method, rather than treating a percentage as a complete description of the material.
Mass measurements add another perspective
Mass spectrometry measures ions and supports assessment of molecular mass. LC–MS combines liquid-chromatographic separation with mass-spectrometric detection. Read the laboratory interpretation and sample details rather than equating the presence of a plot with complete structural confirmation.
Ask how the result was generated
For a procurement comparison, record the method named by the laboratory and what it was intended to establish. Do not treat HPLC, LC–MS and an unspecified third-party test as interchangeable labels.
Keep the conclusion within the scope
Neither a chromatography result nor a mass measurement alone answers every question about contaminants, microbiology, stability or fitness for a particular use. Additional questions require appropriate, separately specified methods.
