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8 markers for buying A quality essential oIL

30/12/2021

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8 markers for buying and using a quality essential oil
By Françoise RAPP, IPF France Chair,
Natural French Aromatherapist and Natural Perfumer Expert
Essential oils are natural products used by different industries, among which stand out pharmaceutical and food industries.
Due to the variability inherent to all-natural products and growing problems of adulteration, the 8 marker points listed below aim to draw attention to the main criteria determining the quality of an essential oil. Purchasing and using a quality essential oil have a strong impact all along the production and consumer chain.
​From respect of the producers work to the impact upon human health, it is vital to be vigilant in what you purchase as a natural perfumer, therapist and consumer. 

1. What are the quality criteria?
The quality criteria of an essential oil are established after in-depth analysis which certifies compliance with standards well established by AFNOR (body for the development of French, European and international standards) which is based on chemotypes (its biochemical ingredients), its density, appearance and odor. 

2. What are the regulations around the world?
  • AFNOR (Association Francaise de Normalisation) Their "New Approach" provides directives and standards for members of the European Union states to facilitate intra-community trade. All companies wishing to exchange goods within Europe are therefore obliged to comply with their directives. For essential oils, they provide guidelines and information on various topics including determination of water content, chromatographic profiles, determination of acid value, content of phenols, etc.
  • ISO (International Organization for Standardization) Their mission is to promote the development of standardization in the areas of intellectual, scientific, technological, and economic activity. For essential oils, they provide guidelines for packaging, conditioning, storage, labeling, sampling, testing, etc. ISO also provides, for a fee, quality standards for individual essential oils.

3. What technical documents prove the quality of an essential oil?
Each batch of essential oil (the batch number must be written on each bottle) has technical documents certifying that the product meets compliance criteria certified by a specialized analysis laboratory. Be sure to find it on the brand's website or ask for the essential oil analysis sheet if you want more transparency about the quality of your product. More and more brands clearly display this data on the product sheet of their website.

4. What quality tests are essential oils subjected to?
Essential oils are subjected to in-depth analyzes in specialized laboratories for this purpose.
• Gas chromatography to map the precise chemical identity of the essential oil and display all of its chemotypes.
• The hydrometer to measure the exact density of the essential oil.
• The rotatory power makes it possible to demonstrate that the essential oil is pure and natural with reference to AFNOR standards.
• The flash point to measure the flash point and check if the essential oil has not been "diluted" with a vegetable oil or a less natural solvent.

5. Is there a market price?
The market price is dependent on tariff fluctuations which are frequent because they depend on criteria linked to various external constraints like any agricultural raw material. Among these, we note the following:
• The seasonality which is essential to obtain favorable prices during the harvest period.
• geopolitics or crises that can ignite the price of local raw materials.
• Quotas decided for ecological reasons (eg rosewood in Brazil).
• the climate which can be devastating or on the contrary help to produce an exceptional crop quality.
• the “fad” phenomenon which can fuel certain venalities or a rise in prices due to excessive consumer demand.

6. What does "100% pure and natural" mean on the bottle label?
This mention often written on the labels of the bottles of essential oil means that this one has not undergone any transformation and that it is not diluted, not rectified, not deterpenated, not rectified (100% pure) and that it comes from a "natural" raw material (the plant).

7. What are the mandatory inscriptions on the label of a bottle of essential oil?
• The best before date or expiration date after opening
• Chemotypes or the essential oil identity card. The main 3 must be listed as ingredients.
• The full botanical name in Latin of the plant
• The origin or provenance of the plant
• The plant organ used to obtain the essential oil

​8. What can impact the quality of an essential oil? 
  • Plants: The quality of essential oils can be negatively impacted by the use of pesticides and other chemicals, the variability in altitude, soil conditions and rainfall, and the difficulty of differentiating plant species and varieties.
  • Processing: Because of the growing popularity of essential oils and aromatherapy, there are many products on the market that may not be suitable for clinical use. They can be found nearly everywhere, from health food stores to discount stores to the Internet. These products may include pure essential oils, but sometimes they are adulterated or diluted. Such adulterations are difficult to identify.
  • Packaging and handling: Other considerations include packaging, storage, and handling. Chemical degradation can occur with exposure to heat, light, or oxygen. Essential oils from citrus products are especially prone to oxidation that can quickly alter the chemistry of those essential oils.
  • Storage: Essential oils should be stored in tightly closed, darkened glass containers in a cool place to ensure lasting quality. Oxidation rates vary, but most essential oils can be safely used for up to 5 years or more after opening. Only citrus essences can have faster oxidation rate compared to essential oils extracted from other plants. 
8 markers for buying and using a quality essential oil
In a world where essential oils can be purchased in large food stores and products can be sold such as this while this is not at all… Caution is definitely required and this is what you are going to learn through the French Natural Aromatherapy course starting on February 7th.
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