If an oil has been adulterated, the weight may be thrown off. Optical Rotation Measures direction, left or right, and the degree to which light rays bend or rotate as they pass through an essential oil. Every oil is made up of unique constituents, which predictably influence the direction and degree to which light rays bend as they pass through the oil. If an oil has been adulterated, the degree of rotation may be thrown off. Refractive Index Measures the speed at which light passing through an essential oil is refracted.
Every oil is made up of unique constituents.
These constituents predictably influence the speed and number of degrees at which they refract light. If an oil has been adulterated, the speed and degree of refraction may be thrown off. Gas Chromatography Separates the individual constituents of an essential oil and measures the amount of each constituent present. This evaluator can screen for non-natural or missing constituents, or constituents occurring in unnaturally high ratios, signifying adulteration. All rights reserved.