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Home Page > Aromatherapy Articles & Guides > GC-MS Test Results - How Can They Be Used?

GC-MS Test Results - How Can They Be Used?

The data collected by way of the combined GC-MS test can be used to compare the specific constituents and their percentages to those of a known sample that possesses reliable purity and is of the optimal quality for the specific botanical.

The results are used in a multitude of ways including the following:

  • Unusual levels of particular constituents in the tested oil can flag that the oil is of inferior quality or has been adulterated. These results can act as a forewarning to suppliers, retailers and manufacturers.

  • Distillers, who of course already know whether the oil they are testing is pure or not, often test their oils to compare with previous distillations to compare quality between harvests and distillations.

  • If the GC-MS results determine that the oil contains an unsuitable level of certain constituents, distillers/producers may adulterate the oil so that the oil appears to be of higher quality.

  • Suppliers and large end users often test their oils to ensure purity and quality.

  • Manufacturers in other industries such as in the personal fragrancing and food/beverage industries where purity is not a concern use the results to identify whether the levels of key constituents are suitable and if not, to potentially alter the oil until the constituent ratios are satisfactory.


Part 1: Introduction
Part 2: Why Is the Quality/Purity of an Essential Oil Important?
Part 3: Aren't Most Essential Oils Pure?
Part 4: Constituents - What do Essential Oils Consist Of?
Part 5: Quality vs. Purity - Aren't They the Same Thing?
Part 6: Quantifiable Testing of Essential Oils
Part 7: GC-MS Test Results - How Can They Be Used?
Part 8: Other Quantifiable Tests for Testing the Quality and Purity of Essential Oils
Part 9: Essential Oil Quality and Purity Conclusion: Final Questions/Answers

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