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Patchouli Essential Oil


Patchouli essential oil has been extensively used for centuries both in  the perfumery industry and for medicinal purposes. The chemistry of this oil is by far the most interesting as it contains only one group of chemical classes called sesquiterpenes. Since most of the constituents are incredibly similar in their molecular mass and structure, their identification is based on the use of GC-MS analysis with due reference to mass spectral databasis. Patchoulol or patchouli alcohol (see below) is  the major constituent which is often  used as a quality marker as it is responsible for most of the characteristic scents of patchouli essential oil.

Below is the GC-MS analysis trace of one commercially available pactchoui essential oil.

The above content analysis together with physical measurements such as optical activity, refractive index, density/specific gravity, etc are routine assays that we perform for assuring the quality of patchouli essential oil.

GC Analysis of Essential Oils

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Dr Habtemariam BSc, MSc, PhD........FRSM, FRSC. .... With a Principal Lecturer post at Greenwich, Dr Habtemariam is a leader of the BSc Pharmaceutical Science programme and researches on bioassay & natural products-based drug development. ....More

 

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