Not a day goes by that I don't get one or all of these questions, "How do we know which oils are pure and not adulterated?" "Which companies are best?" "What is your standard for purchasing essential oils?"
My answer remains the same to each of these questions. If the company you are looking at purchasing essential oils from will provide the GC/MS (Gas Chromatography/Mass Spectrometry)certificates on their oils, I will consider purchasing from them. What in the world is a GC/MS certificate or sheet? The GC test is tubular column where a small amount of essential oil is injected and analyzed. The components of the essential oil are tested and the percentages recorded. While this test doesn't identify every single component present it can be used in comparative analysis to known standards for each essential oil. A second test is required for proper identification, Mass Spectrometry.
Mass Spectrometry/MS analyzes and identifies each individual component of essential oils. When coupled with the GC test a characteristic pattern occurs for each essential oil molecule and is identified, catalogued and held in a library. If the essential oil has components that are not characteristic of a particular oil we can speculate that perhaps there are other elements present which change the therapeutic properties and quality of the oil. This is called adulteration. I don't purchase those oils because I don't know what I'm working with. The oil might have a component in it that a client is allergic or sensitive to. Not worth the risk to me.
Further, if the company that supplies the essential oil will not provide the GC/MS information you might wonder why not. If an oil such as lavender is only lavender it should have a clear GC/MS certificate which is similar to that of any other quality essential oil company that sells lavender. I can see where some companies might not want to share the GC/MS sheets of blends because then they could be replicated. I don't always want to put all of the ingredients on my labels but I have to in order to keep you safe.
So, bottom line. Buy oils that provide the GC/MS. Simple.
My name is, Polly J. Huenink-Schellinger. I am a Registered Nurse, Board Certified Holistic Nurse, Reflexologist, Clinical Aromatherapist, Parish Nurse, Certified Healing Touch Practitioner and Prepare for Surgery, Heal Faster Facilitator.