At Aqua Oleum they believe that climate should be taken into account when defining characteristic odour. At present, international standards do not recognize the origin of an essential oil as a factor. Due to the difficulties described, quality parameters for essential oils are very wide. It follows that the wider the parameters are, the more scope there will be for adulteration. We have therefore developed our own strict definition of characteristic odour using our own company records and having had over 30 years of experience in the field. We also work closely with trustworthy suppliers and growers to ensure the quality of our oils, which includes examination of their GC / MS traces (see EDUCATION). Thus, we ensure that all our oils meet the following criteria:
1. The plant must be the mother species.
2. The plant must be grown in an area where the species is indigenous.
3. The oil must be extracted from 100% named botanical species.
4. The extraction technology should extract the complete oil rather than a fraction (as shown in the GC/MC trace).