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HPLC (High-Performance Liquid Chromatography) is a technique used to separate and identify the components of a mixture based on their different interactions with a stationary and a mobile phase. In the case of lavender oil, HPLC can be used to separate the different constituents of the oil, such as linalool, linalyl acetate, and camphor. The sample is injected into the HPLC system, and the components are separated as they pass through a column packed with a stationary phase. The mobile phase is then passed through the column, and the components elute at different times based on their affinity for the stationary and mobile phases. The elution of the components is detected by a detector, such as a UV-Vis detector, and the data is recorded as a chromatogram. The chromatogram shows the different peaks that correspond to the different components of the oil. By comparing the retention times of the peaks to the retention times of known standards, the components of the oil can be identified.