> Aromatherapy Articles & Guides > Quantifiable Testing of
Essential Oils Quantifiable Testing of Essential Oils for
Quality and Purity Several quantifiable tests exist that allow
scientists, producers, suppliers and end users to be able to
test their oils to determine quality and help to ascertain if an
oil is pure and of the quality sought after for each particular
Gas Chromatography and Mass Spectroscopy (GC-MS) Testing by
means of Gas Chromatography and Mass Spectroscopy can help to
verify that the constituents contained within an essential oil
sample are representative of what that particular essential oil
should contain. Gas Chromatography and Mass Spectroscopy are two
separate tests that are usually both conducted on an oil
specimen to identify constituents contained within it. Mass
Spectrometry assists in identification of the specific
constituents measured within Gas Chromatography, so typically,
both tests are done together. Gas Chromatography, also known as
Gas Liquid Chromatography is abbreviated