Test the Purity of Essential oils

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How to Test the Purity of Essential Oil Essential oils can be expensive, so you want to be sure oils labeled as 'pure' or 'essential' are what they claim to be. If you have essential oil, you will want to make sure it is pure and not diluted in a base oil. Testing your oil is very important for calculating proper dosage, since essential oils are much stronger than diluted oils. Essential oils are volatile, meaning they will evaporate. Base oils do not evaporate; they leave enduring grease spots on paper or fabrics.

Materials

oil to be tested pipette or dropper paper coffee filter or tissue (no lotion or scent)

Directions

Apply a drop or two of oil to the tissue or coffee filter. Place the tissue or filter in a well-ventilated area. Allow the oil to evaporate. Examine the spot. Essential oils are very volatile and will vaporize over time. Base oils, on the other hand, will remain as oil spots on your filter or tissue. If your essential oil is colored or dark, hold the paper up to a light. You should be able to see if the spot is simply an area of color or whether it is oil residue. Some essential oils take longer than others to evaporate.

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