What is a GC/MS report?

What is a GC/MS report? Quality control and assurance of essential oils is provided by GC/MS report. The gas- liquid chromatography (GC) is used to determine the percentage of the constituents making up the essential oil. Mass spectrometry (MS) determines the molecular mass of each molecule, thus identifying each constituent of the essential oil. The technique is used to analyse the essential oil quality.

What is a GC/MS report?